Heal the Bay Blog

Category: Locations

Freshwater Friday: Safe to Swim in Malibu Creek?

08.12.2016 | Heal the Bay

Malibu / Pacific Palisades River Report Card

For 2017 grades, please see our River Report Card.

Heal the Bay’s inaugural study of Los Angeles River microbial water quality that we published July 27, 2016 and last year’s study on swimming holes in the Santa Monica Mountains called for more readily available public water quality information. The public has a right to know about water quality conditions in these freshwater recreation areas so that they can make informed decisions on how to minimize the risk of getting sick.

We will be posting an update every Friday during the summer with water quality information from our weekly sampling of freshwater recreation sites in Los Angeles County.

Malibu Creek State Park – Number of Exceedances
Site Name	9/29/16	9/21/16	9/15/16	9/7/16	8/31/16	8/24/16	8/17/16	8/10/16	8/3/16
Rock Pool	0 out of 4 None of the four criteria exceed the threshold values this week at Rock Pool site in Malibu Creek. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml as was the geometric mean value for Enterococcus (below 30 MPN/100ml). Since June 15, 2016, we have documented exceedance rates (for single samples) of 20% for E. coli and 13% for Enterococcus at this site.	0 out of 4 None of the four criteria exceed the threshold values this week at Rock Pool site in Malibu Creek. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml as was the geometric mean value for Enterococcus (below 30 MPN/100ml). Since June 15, 2016, we have documented exceedance rates (for single samples) of 21% for E. coli and 14% for Enterococcus at this site.	0 out of 4 None of the four criteria exceed the threshold values this week at Rock Pool site in Malibu Creek. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml as was the geometric mean value for Enterococcus (below 30 MPN/100ml). Since June 15, 2016, we have documented exceedance rates (for single samples) of 23% for E. coli and 15% for Enterococcus at this site.	1 out of 4 Only one of the four criteria exceeds the threshold values this week at Rock Pool site in Malibu Creek. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since June 15, 2016, we have documented exceedance rates (for single samples) of 25% for E. coli and 17% for Enterococcus at this site.	1 out of 4 Only one of the four criteria exceeds the threshold values this week at Rock Pool site in Malibu Creek. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since June 15, 2016, we have documented exceedance rates (for single samples) of 27% for E. coli and 18% for Enterococcus at this site.	2 out of 4 Two of the four criteria exceed the threshold values this week at Rock Pool site in Malibu Creek. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. In contrast, both the single sample and geometric mean values for Enterococcus were over their respective thresholds. Since June 15, 2016, we have documented exceedance rates (for single samples) of 30% for E. coli and 20% for Enterococcus at this site.	1 out of 4 One of the four criteria exceeds the threshold values this week at Rock Pool site in Malibu Creek. For both E. coli and Enterococcus, the single sample values were under their respective thresholds. The geometric mean value for E. coli was under its threshold, while Enterococcus was over its threshold. Since June 15, 2016, we have documented exceedance rates (for single samples) of 33% for E. coli and 11% for Enterococcus at this site.	2 out of 4 Two of the four criteria exceed the threshold values this week at Rock Pool site in Malibu Creek. For both E. coli and Enterococcus, the single sample values were under their respective thresholds but the geometric mean values were over the thresholds. Since June 15, 2016, we have documented exceedance rates (for single samples) of 33% for E. coli and 12% for Enterococcus at this site.	3 out of 4 Three of the four criteria exceed the threshold values this week at Rock Pool site in Malibu Creek. For E. coli, the single sample and geometric mean values were over threshold values; the single sample Enterococcus value was under the threshold of 110 MPN/100ml but the geometric mean value was over the threshold value. Since June 15, 2016, we have documented exceedance rates (for single samples) of 43% for E. coli and 14% for Enterococcus at this site.
Las Virgenes Creek at the Bridge	1 out of 4 Only one of the four criteria exceed the threshold values this week at Las Virgenes Creek at the bridge. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since June 15, 2016, we have documented exceedance rates (for single samples) of 27% for E. coli and 53% for Enterococcus at this site.	3 out of 4 Three of the four criteria exceed the threshold values this week at Las Virgenes Creek at the bridge. The single sample E. coli value was below the threshold of 235 MPN/100ml but the geometric mean value for E. coli was over the threshold of 126 MPN/100ml.The single sample Enterococcus value was over the threshold of 110 MPN/100ml and the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since June 15, 2016, we have documented exceedance rates (for single samples) of 29% for E. coli and 57% for Enterococcus at this site.	2 out of 4 Two of the four criteria exceed the threshold values this week at Las Virgenes Creek at the bridge. The single sample E. coli value was below the threshold of 235 MPN/100ml but the geometric mean value for E. coli was over the threshold of 126 MPN/100ml.The single sample Enterococcus value was below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since June 15, 2016, we have documented exceedance rates (for single samples) of 31% for E. coli and 54% for Enterococcus at this site.	2 out of 4 Two of the four criteria exceed the threshold values this week at Las Virgenes Creek at the bridge. The single sample E. coli value was below the threshold of 235 MPN/100ml but the geometric mean value for E. coli was over the threshold of 126 MPN/100ml.The single sample Enterococcus value was below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since June 15, 2016, we have documented exceedance rates (for single samples) of 33% for E. coli and 58% for Enterococcus at this site.	3 out of 4 Three of the four criteria exceed the threshold values this week at Las Virgenes Creek at the bridge. The single sample and geometric mean values for E. coli value were both over their respective thresholds of 235 MPN/100ml and 126 MPN/100ml. The single sample Enterococcus value was below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since June 15, 2016, we have documented exceedance rates (for single samples) of 36% for E. coli and 64% for Enterococcus at this site.	3 out of 4 Three of the four criteria exceed the threshold values this week at Las Virgenes Creek at the bridge. The single sample E. coli value was below the threshold of 235 MPN/100ml, while the geometric mean for E. coli was over 126 MPN/100ml. Both the single sample and geometric mean values for Enterococcus were over their respective thresholds. Since June 15, 2016, we have documented exceedance rates (for single samples) of 30% for E. coli and 70% for Enterococcus at this site.	4 out of 4 Four of the four criteria exceed the threshold values this week at Las Virgenes Creek at the bridge. The single sample E. coli value was above the threshold of 235 MPN/100ml, and the geometric mean for E. coli was over 126 MPN/100ml. Similarly, both the single sample and geometric mean values for Enterococcus were over their respective thresholds. Since June 15, 2016, we have documented exceedance rates (for single samples) of 33% for E. coli and 67% for Enterococcus at this site.	3 out of 4 Three of the four criteria exceed the threshold values this week at Las Virgenes Creek at the bridge. The single sample E. coli value was below the threshold of 235 MPN/100ml but the geometric mean for E. coli was over 126 MPN/100ml, and both the single sample and geometric mean values for Enterococcus were over their respective thresholds. Since June 15, 2016, we have documented exceedance rates (for single samples) of 25% for E. coli and 62% for Enterococcus at this site.	3 out of 4 Three of the four criteria exceed the threshold values this week at Las Virgenes Creek at the bridge. The single sample E. coli value was below the threshold of 235 MPN/100ml but the geometric mean for E. coli was over 126 MPN/100ml, and both the single sample and geometric mean values for Enterococcus were over their respective thresholds. Since June 15, 2016, we have documented exceedance rates (for single samples) of 29% for E. coli and 57% for Enterococcus at this site.

Los Angeles River – Number of Exceedances
Site Name	9/27/16	9/20/16	9/13/16	9/6/16	8/30/16	8/23/16
Steelhead Park, Elysian Valley	1 out of 4 Only one of the four criteria exceeds the threshold values this week at the Steelhead Park site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since May 31, 2016, we have documented exceedance rates (for single samples) of 6% for E. coli and 61% for Enterococcus at this site.	1 out of 4 Only one of the four criteria exceeds the threshold values this week at the Steelhead Park site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since May 31, 2016, we have documented exceedance rates (for single samples) of 6% for E. coli and 65% for Enterococcus at this site.	1 out of 4 Only one of the four criteria exceeds the threshold values this week at the Steelhead Park site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since May 31, 2016, we have documented exceedance rates (for single samples) of 6% for E. coli and 69% for Enterococcus at this site.	1 out of 4 Only one of the four criteria exceeds the threshold values this week at the Steelhead Park site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since May 31, 2016, we have documented exceedance rates (for single samples) of 7% for E. coli and 73% for Enterococcus at this site.	2 out of 4 Two of the four criteria exceed the threshold values this week at the Steelhead Park site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. In contrast, both the single sample and geometric mean values for Enterococcus were over their respective thresholds (110 and 30 MPN/100ml). Since May 31, 2016, we have documented exceedance rates (for single samples) of 7% for E. coli and 79% for Enterococcus at this site.	2 out of 4 Two of the four criteria exceed the threshold values this week at the Steelhead Park site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. In contrast, both the single sample and geometric mean values for Enterococcus were over their respective thresholds. Since May 31, 2016, we have documented exceedance rates (for single samples) of 8% for E. coli and 77% for Enterococcus at this site.
Rattlesnake Park, Elysian Valley	3 out of 4 Three of the four criteria exceed the threshold values this week at the Rattlesnake Park site for the Los Angeles River. The single sample value for E. coli was below the threshold of 235 MPN/100ml, but the geometric mean for E. coli was over the threshold of 126 MPN/100ml. Both the single sample and geometric mean values for Enterococcus were also over their respective thresholds (110 and 30 MPN/100ml). Since May 31, 2016, we have documented exceedance rates (for single samples) of 50% for E. coli and 100% for Enterococcus at this site.	4 out of 4 All four of the criteria exceed the threshold values this week at the Rattlesnake Park site for the Los Angeles River. The single sample and geometric mean values for E. coli value were above the thresholds of 235 and 126 MPN/100ml, respectively. Both the single sample and geometric mean values for Enterococcus were also over their respective thresholds (110 and 30 MPN/100ml). Since May 31, 2016, we have documented exceedance rates (for single samples) of 53% for E. coli and 100% for Enterococcus at this site.	4 out of 4 All four of the criteria exceed the threshold values this week at the Rattlesnake Park site for the Los Angeles River. The single sample and geometric mean values for E. coli value were above the thresholds of 235 and 126 MPN/100ml, respectively. Both the single sample and geometric mean values for Enterococcus were also over their respective thresholds (110 and 30 MPN/100ml). Since May 31, 2016, we have documented exceedance rates (for single samples) of 50% for E. coli and 100% for Enterococcus at this site.	3 out of 4 Three of the four criteria exceed the threshold values this week at the Rattlesnake Park site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, but the geometric mean for E. coli was over 126 MPN/100ml. Both the single sample and geometric mean values for Enterococcus were over their respective thresholds (110 and 30 MPN/100ml). Since May 31, 2016, we have documented exceedance rates (for single samples) of 47% for E. coli and 100% for Enterococcus at this site.	3 out of 4 Three of the four criteria exceed the threshold values this week at the Rattlesnake Park site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, but the geometric mean for E. coli was over 126 MPN/100ml. Both the single sample and geometric mean values for Enterococcus were over their respective thresholds (110 and 30 MPN/100ml). Since May 31, 2016, we have documented exceedance rates (for single samples) of 50% for E. coli and 100% for Enterococcus at this site.	4 out of 4 Four of the four criteria exceed the threshold values this week at the Rattlesnake Park site for the Los Angeles River. The single sample E. coli value was above the threshold of 235 MPN/100ml, and the geometric mean for E. coli was over 126 MPN/100ml. Similarly, both the single sample and geometric mean values for Enterococcus were over their respective thresholds. Since May 31, 2016, we have documented exceedance rates (for single samples) of 54% for E. coli and 100% for Enterococcus at this site.
Sepulveda Basin at Burbank Blvd.	1 out of 4 Only one of the four criteria exceeds the threshold values this week at the Sepulveda Basin site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since May 31, 2016, we have documented exceedance rates (for single samples) of 0% for E. coli and 6% for Enterococcus at this site.	1 out of 4 Only one of the four criteria exceeds the threshold values this week at the Sepulveda Basin site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since May 31, 2016, we have documented exceedance rates (for single samples) of 0% for E. coli and 6% for Enterococcus at this site.	1 out of 4 Only one of the four criteria exceeds the threshold values this week at the Sepulveda Basin site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since May 31, 2016, we have documented exceedance rates (for single samples) of 0% for E. coli and 6% for Enterococcus at this site.	1 out of 4 Only one of the four criteria exceeds the threshold values this week at the Sepulveda Basin site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since May 31, 2016, we have documented exceedance rates (for single samples) of 0% for E. coli and 7% for Enterococcus at this site.	1 out of 4 Only one of the four criteria exceeds the threshold values this week at the Sepulveda Basin site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. The single sample Enterococcus value was also below the threshold of 110 MPN/100ml but the geometric mean value for Enterococcus was over the threshold of 30 MPN/100ml. Since May 31, 2016, we have documented exceedance rates (for single samples) of 0% for E. coli and 7% for Enterococcus at this site.	2 out of 4 Two of the four criteria exceed the threshold values this week at the Sepulveda Basin site for the Los Angeles River. The single sample E. coli value was below the threshold of 235 MPN/100ml, and the geometric mean for E. coli was below 126 MPN/100ml. In contrast, both the single sample and geometric mean values for Enterococcus were over their respective thresholds. Since May 31, 2016, we have documented exceedance rates (for single samples) of 0% for E. coli and 8% for Enterococcus at this site.

We envision safe swimmable rivers and creeks throughout Los Angeles County. However, a number of recreational waterbodies are not regularly monitored or monitored at all. We know thousands of Angelenos use these aquatic resources.

As such, Heal the Bay would rather provide some information about the water quality they are immersing themselves into rather than no information. The idea is to prompt the user to ask questions about these waterbodies: What is the origin of the water? Can I get sick from it? What types of illnesses can I get? How do I get more information? Check out the answers to these questions and more in our FAQ and the joint statement on recreation in the L.A. River.

Malibu Creek State Park testing sites map

Heal the Bay has been monitoring water quality in streams and rivers since 1998 through our Stream Team program. In 2014 we initiated a pilot study to monitor human use and water quality at freshwater swimming spots in the Santa Monica Mountains, focusing on bacterial pollution and public health implications. We are currently in our third summer of monitoring water quality in those swimming locations. Given Heal the Bay’s 25-year history of informing and educating beachgoers about beach water quality through our Beach Report Card, assessing the water quality of the Los Angeles River recreation zones was a natural next step. We are now in our second season of monitoring for the L.A. River recreation zones.

The A-to-F grading system of the Beach Report Card took years of work to develop and fine-tune. We are only in the very early stages of thinking about an analogous River Report Card. But we want to start by making basic water quality information available to the public in a timely manner.

We will be providing weekly information about levels of fecal indicator bacteria at five sites. We will report on whether the sample from the current week exceeded limits set by the Regional Water Quality Control Board and US EPA and what the microbial water quality has been over the summer sampling season thus far.

We will report on two types of fecal indicator bacteria, or FIB: E. coli and Enterococcus. FIB, while not harmful themselves, indicate the possible presence of pathogenic bacteria, which have been found to cause ear infections, skin rashes, respiratory illnesses and gastrointestinal illness. High levels of FIB are particularly concerning in areas where people come in contact with water through activities like swimming, fishing, and kayaking.

Excuse us for getting technical in this next section, but we just want to be clear about what we are measuring and what constitutes an exceedance.

We compare bacteria levels measured at each site to water quality objectives from the Total Maximum Daily Loads (TMDL) for Bacteria in the Malibu Creek Watershed and the Los Angeles River Watershed as well as EPA’s 2012 Recreational Water Quality Criteria (RWQC)

The freshwater regulatory limit for E. coli is set in the TMDL at 235 MPN/100ml for a single sample and 126 MPN/100ml for the geometric mean. (A geometric mean is a type of average that results in a number that is not as heavily affected by very high or very low values).

We calculate geometric means from all samples over the last 30-day period (usually four or five samples). For Enterococcus, we used EPA’s statistical threshold value for an illness rate of 32/1,000 (the more protective rate), which is 110 MPN/100ml for a single sample and 30 MPN/100ml for the geometric mean in a fresh waterbody designated for recreation.

For each site, we will report on the number of criteria that exceeded four standards. A site can have 0-4 out of four exceedances. A sample exceeds if:

E. coli single sample > 235 MPN/100ml
E. coli geometric mean > 126 MPN/100ml
Enterococcus single sample is > 110 MPN/100ml
Enterococcus geometric mean is > 30 MPN/100ml

So, what does that all mean?

The greater the number and magnitude of exceedances at a site, the worse the water quality is, indicating a potentially increased risk of getting sick.

Deciding what to do with this information depends on the risk level you are comfortable with. Single sample values give you an indication of the most recent water quality, while geometric mean values give you an indication of the ambient water quality over the last 30 days.

However, it is important to note that the single sample gives information for the day on which the sample was taken and conditions can change throughout the week until the next sample is taken.

The thresholds that the US EPA and the RWQCB have put forth are based on epidemiological studies and risk. An increased risk of illness is not a guarantee that you will get sick. Certain activities are more risky when water quality is poor; for instance, swimming and submerging your head is more risky than wading; swimming is more risky than kayaking; kayaking is likely more risky than hiking (at least with regards to picking up a waterborne illness), and so on, with the risk dependent on how likely you are to ingest or contact water.

We recommend following these best practices to stay safe and healthy.

Swimming: In waters known to exceed bacterial limits, swimming is not recommended, particularly submerging one’s head. Elevated bacteria levels can occur at any time. Swimmers should use caution when entering the water by checking the latest water quality results, avoiding contact immediately after a rainfall, if they are immunocompromised, or if they have an open wound. If there is any water contact, then rise off with soap and water afterward.
Kayaking and Fishing: In waters that are known to exceed bacterial limits, people should limit water contact, especially avoiding hand-to-face water contact. Users should not enter the water with an open wound, if immunocompromised, or after a rainfall. If there is any water contact, then rinse off with soap and water afterward.

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Freshwater Friday: Safe to Swim in Malibu Creek?

08.05.2016 | Katherine Pease

Malibu / Pacific Palisades River Report Card

Aug, 5, 2016 — Staff scientist Katherine Pease launches our Freshwater Friday blog post, providing weekly updates on the latest bacterial exceedances at popular recreational zones

Heal the Bay’s inaugural study of Los Angeles River microbial water quality that we published last week and last year’s study on swimming holes in the Santa Monica Mountains called for more readily available public water quality information. The public has a right to know about water quality conditions in these freshwater recreation areas so that they can make informed decisions on how to minimize the risk of getting sick.

So beginning today with our Santa Monica Mountains sites, we will be posting a blog post every Friday during the summer with water quality information from our weekly sampling of freshwater recreation sites in Los Angeles County. (You can see this week’s findings at the bottom of this page, but first we want to explain our intent and methodology.)

As such, Heal the Bay would rather provide some information about the water quality they are immersing themselves into rather than no information. The idea is to prompt the user to ask questions about these waterbodies: What is the origin of the water? Can I get sick from it? What types of illnesses can I get? How do I get more information? We will be posting a Frequently Asked Questions document next week to help answer some of these questions.

Excuse us for getting technical in this next section, but we just want to be clear about what we are measuring and what constitutes an exceedance.

We compare bacteria levels measured at each site to water quality objectives from the Total Maximum Daily Loads (TMDL) for Bacteria in the Malibu Creek Watershed and EPA’s 2012 Recreational Water Quality Criteria (RWQC)

We calculate geometric means from all samples over the last 30-day period (usually four or five samples). For Enterococcus, we used EPA’s statistical threshold value (for an illness rate of 32/1,000 (the more protective rate), which is 110 MPN/100ml for a single sample and 30 MPN/100ml for the geometric mean in a fresh waterbody designated for recreation.

For each site, we will report on the number of criteria that exceeded four standards. A site can have 0-4 out of four exceedances. A sample exceeds if:

E. coli single sample > 235 MPN/100ml

E. coli geometric mean > 126 MPN/100ml

Enterococcus single sample is > 110 MPN/100ml

Enterococcus geometric mean is > 30 MPN/100ml

So, what does that all mean?

The greater the number and magnitude of exceedances at a site, the worse the water quality is, indicating a potentially increased risk of getting sick.

However, it is important to note that the single sample gives information for the day on which the sample was taken and conditions can change throughout the week until the next sample is taken.

We recommend following these best practices to stay safe and healthy.

Swimming: In waters known to exceed bacterial limits, swimming is not recommended, particularly submerging one’s head. Elevated bacteria levels can occur at any time. Swimmers should use caution when entering the water by checking the latest water quality results, avoiding contact immediately after a rainfall, if they are immunocompromised, or if they have an open wound. If there is any water contact, then rise off with soap and water afterward.
Kayaking and Fishing: In waters that are known to exceed bacterial limits, people should limit water contact, especially avoiding hand-to-face water contact. Users should not enter the water with an open wound, if immunocompromised, or after a rainfall. If there is any water contact, then rinse off with soap and water afterward.

Malibu Creek State Park

for the week ending August 3, 2016

1. Rock Pool: Three exceedances

Three of the four criteria exceed the threshold values this week at Rock Pool site in Malibu Creek. For E. coli, the single sample and geometric mean values were over threshold values; the single sample Enterococcus value was under the threshold of 110 MPN/100ml but the geometric mean value was over the threshold value. Since June 15, 2016, we have documented exceedance rates (for single samples) of 43% for E. coli and 14% for Enterococcus at this site.

2. Las Virgenes Creek at the bridge: Three exceedances

Three of the four criteria exceed the threshold values this week at Las Virgenes Creek at the bridge. The single sample E. coli value was below the threshold of 235 MPN/100ml but the geometric mean for E. coli was over 126 MPN/100ml, and both the single sample and geometric mean values for Enterococcus were over their respective thresholds. Since June 15, 2016, we have documented exceedance rates (for single samples) of 29% for E. coli and 57% for Enterococcus at this site.

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Deconstructing the Sewage Spill in the L.A. River

07.22.2016 | Rita Kampalath

Long Beach / Avalon

July 22, 2016 — Science and policy director Rita Kampalath gets to the bottom of the massive sewage spill that made a mess of the L.A. River.

Perfect blue sky, 95 degrees outside … and the beaches are closed??

After years of hard work, Heal the Bay is thankful that the days of sewage fouling our waterways are largely behind us. But we got a bad flashback to the old days this week when an estimated 1.75 million gallons of raw sewage spilled into the L.A. River late Monday and early Tuesday. The spill itself was estimated at 2.5 million gallons, roughly 800,000 gallons of which were captured before they reached the river. A rupture in an aging sewer pipe in the Boyle Heights area had been identified as the likely culprit.

We’ve heard a lot about our nation’s crumbling infrastructure, and L.A. isn’t immune to these issues. But the City of Los Angeles’ decision to invest in sewer upgrades over the past few years has largely paid off.

An estimated investment of $200M per year has resulted in an 85% reduction of sanitary sewer overflows (i.e., sewage spills) since 2000. But when popular shorelines in Long Beach and Seal Beach are closed for days because of a spill, you know a major amount of waste must have been discharged and something had seriously gone wrong.

I wanted to find out more about what could have caused such a catastrophic failure of a major sewer line and what was being done to fix it. So Thursday morning, the City of L.A. Bureau of Sanitation staff graciously offered to give me an up-close-and-personal view of the rupture area.

Site of the bridge demolition We pulled up to the site, located where active construction is already going on – the highly publicized demolition of the 6th Street Bridge in Boyle Heights. The immediate rupture area was now cleared of the heavy machinery ever-present during the months-long razing of the iconic bridge, but I could still hear demolition crews working nearby. I couldn’t help but wonder if all this heavy construction nearby might have played a role in the failure of the sewer line.

As we surveyed the damage, City staff explained that the spill was detected following sinkholes that had recently formed in the road, roughly at the intersection of Mission Road and 6th Street. These collapses and the associated debris ruptured and then clogged the massive 60-inch trunk line known as the North Outfall Sewer (NOS), causing a back-up of waste, which, given the volume flowing through the enormous pipe, quickly and unfortunately made it into the river.

With crews working around the clock, a diversion was ultimately put into place to direct sewage around the damaged pipe. Cleanup quickly commenced and is still ongoing.

In the early days after a troubling incident like this, we have at least as many questions as answers. We are urging the City to continue investigating the causes and impacts of the spill. What conditions underground led to the sinkholes? Did the months of construction and associated heavy machinery and demolition play a role? What safeguards were put into place to protect the relatively shallow sewer lines during the demolition? The top of the NOS is only 16 feet below ground.

What sort of controls will be put into place to avoid future spills along our key waterways? And, who will be held accountable for this spill? It is also a keen reminder that we need to continue to invest in our aging infrastructure to avoid incidents like this in the future.

When our region’s famously perfect weather starts to veer towards scorching, people want to take advantage of another enviable asset – our recreational waters. But they need to know a day at the beach isn’t going to make them sick.

Left to right: Barry Berggren, Rita Kampalath, Brian McCormick, and Adel Hagekhalil

So we commend and thank the authorities in Long Beach and Orange County for making the wise decision to prioritize public health and close the beaches as soon as news of the sewage spill came out. But it’s a shame that on this hot weekend some of our best avenues for relief may be out of commission. As a watchdog of our local waterways, Heal the Bay will continue to track the investigation and follow-up on this massive spill, advocating for appropriate accountability measures and preventative actions to protect our vital rivers and beaches.

Spills are fortunately rare occurrences on the river. But chronic bacterial pollution still plagues some of its popular recreational zones. That’s not good news for the increasing number of people who are now kayaking, swimming and angling in its waters.

My colleague Katherine Pease and her team have been collecting and analyzing water samples along the river for harmful bacteria. Next week she will release the results of her study. Let’s just say that if you care about public health, you will be very interested in its findings. Stay tuned.

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Huge Sewage Spill Soils Long Beach, L.A. River

07.19.2016 | Heal the Bay

Long Beach / Avalon

July 20, 2016 — UPDATE: L.A. Sanitation estimates that 2,853,200 gallons of sewage was released from the broken sewer during Monday’s spill. Of this amount, 829,100 gallons were contained and returned to the sewer system, while 1,754,100 gallons ultimately reached the Los Angeles River. Emergency sewer repair crews are constructing a permanent bypass system to divert sewage flow around the portion of the pipe that collapsed.

We are still awaiting more complete water quality data from Long Beach and Seal Beach.

July 19, 2016 — BREAKING NEWS: Yesterday afternoon around 2 p.m., a large sewage pipe ruptured near Boyle Heights, spilling 2.4 million gallons of sewage into the L.A. River. The river empties out in Long Beach, so, as a precautionary measure, all beaches in the city of Long Beach are currently closed until further notice. Beaches in Seal Beach from the mouth of the San Gabriel River to Anaheim Bay are also closed.

It’s too early to pinpoint the exact cause of the spill, but aging water and sewage infrastructure is likely to blame: The pipe that collapsed was built in 1929.

While no sewage has been seen on the beach yet, ocean water samples are currently being tested for bacteria that could make swimmers sick. Results should be available on Wednesday, and beaches could reopen as early as Thursday.

Heal the Bay water quality scientists are in touch with public health officials and will keep this blog updated as the situation develops.

For the latest updates, follow us on Twitter at @healthebay and @beachreportcard.

Long Beach closed due to sewage spill (Image by Gary Coronado / Los Angeles Times)

Sources: Los Angeles Times, Patch.com

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Biodiversity Blossoms, BioBlitz Report Reveals

07.13.2016 | Heal the Bay

Ballona Wetlands Santa Monica

July 14, 2016 — This past spring Heal the Bay hosted our first-ever BioBlitzes at two of Los Angeles’ remaining wetlands: Malibu Lagoon and Ballona Wetlands. BioBlitzes bring people together to rapidly (over a period of a few hours) catalogue and identify plant and animal life in biodiverse areas. Wetlands are unique and critical ecosystems that are in trouble – in the last couple hundred years, Southern California has lost over 90% of its native wetlands.

Wetlands provide many services, which often go by unappreciated. They help regulate climate, store surface water, control pollution and flooding, replenish natural aquifers, protect shorelines, maintain natural communities of plants and animals, and provide opportunities for education and recreation. (For more information about Southern California’s wetlands, check out http://scwrp.org/general-wetlands-information/). Unfortunately, years of development and degradation have destroyed the flow of water, altering the habitat for wetland animals and plants. Heal the Bay supported the restoration of Malibu Lagoon from 2012 to 2013 and now we’re lobbying for the restoration of Ballona Wetlands as well to bring it back to a healthy, functional state. Our BioBlitz events helped capture and illuminate the amazing biodiversity of these areas. After crunching the numbers from these events, it seems timely to share our findings leading up to this Saturday’s beach cleanup and sneak peek at the Ballona reserve.

Malibu Lagoon species diversity pie chart Most of our observations were of the amazing plants that rely on the wetlands to thrive. Plants form this environment’s base, providing a natural filter for water as it passes through. They also provide habitat, food, and shelter for the populations of birds, insects, and reptiles that live in wetlands. We found both sites were host to dozens of bird species including great blue herons, snowy egrets, and brown pelicans. Every year, almost one billion birds migrate along the coast of California in an area known as the Pacific coast flyway. Wetlands in Southern California are a crucial pit stop for migratory birds and the diversity of species we observed is promising. In just three hours at Ballona, we saw 17 different species of birds – almost a third of the bird species found in an extensive wetlands survey conducted by The Bay Foundation that spanned months. This shows the power of BioBlitzes to capture important data for conservation.

Malibu Lagoon species diversity bar graph From 2012 to 2013, Heal the Bay advocated for an ecological restoration of Malibu Lagoon which involved removing invasive species, replanting native ones, and adjusting the hydrology of the wetland. Inventories done by The Bay Foundation showed only six species of native plants prior to restoration, while almost 41 were noted after the restoration! Since plants form the base of an intricate web of life in the wetlands, bringing back natives can also bring back other species – including those that are threatened. At both sites our BioBlitzers found four threatened species, but that number will certainly increase with more sampling.

We found more than 20 introduced species at each site, which means they arrived through human influence. These invaders include everything from the delicate cabbage white butterfly to the crystalline ice plant. Invasive species are one of the biggest threats to healthy wetlands because they can outcompete native species and overtake the habitat. Since the restoration at Malibu Lagoon, the pervasiveness of non-natives has decreased. While Ballona is still struggling with invasive species, we hope planned restoration efforts will allow this wetland to reach its full potential.

Thanks to all of our “blitzers” for helping us Blitz the Bay in Ballona Wetlands and Malibu Lagoon. Keep exploring, enjoying, and fighting for our wetlands!

Citizen Science Coordinator Catherine Hoffman led these successful blitzing efforts.

Brown Pelican by iNaturalist user @glmory

A couple junior BioBlitzers looking for fauna in the creekbed

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We’re Serious About Sand Crabs

07.07.2016 | Heal the Bay

Heal the Bay Aquarium Santa Monica

July 7, 2016 — Over the last ten months, citizen scientists of all ages helped our Santa Monica Pier Aquarium survey the humble Pacific Mole Crab (commonly known as the sand crab). More than 60 volunteers collected an immense amount of data about these sand crabs on the beach just outside the Aquarium’s doors – what did they learn?

Last year the Aquarium partnered with the Long-term Monitoring Program and Experiential Training for Students (LiMPETS). This statewide program activates people along the entire California coast to do real science through hands-on data collection – at the Santa Monica Pier we focused entirely on sand crabs, an indicator species useful for measuring the health of the entire ecosystem. We observed how rainfall, water temperature and tides affected the size, sex and abundance of sand crabs.

After consistently collecting data for almost a year we are beginning to see some trends. What is most exciting is the sheer number of sand crabs we’ve been seeing lately. In the winter, if we found two sand crabs we knew it was a good day. Now we’re consistently finding 15-25! What’s behind this drastic change?

The answer has to do with the sand crab’s life cycle. Adult sand crabs have a mating season between November and February. Their eggs develop for 30 days, before hatching into planktonic larvae. These larvae float around in the ocean for a little over four months and go through six different life stages (which ensures that they become widely dispersed and colonize new areas)! They eventually settle onto shore as juveniles, or “recruits,” and about a month later become fully grown adults. This explains why we are currently finding so many sand crabs, especially many of the recruits that were laid in the early months of mating season, drifted as plankton for months, and have now made the Santa Monica beach their home. As they continue to feed and grow, they will soon start the process all over again.

So if you joined on a sand crab survey trek in the winter, be sure to come back and help us find, count, and measure all of the sand crabs we have been finding on the Santa Monica beach!

Taylor Spesak is the Aquarium’s public programs educator. Join him every Wednesday at 3pm for sand crab monitoring. The program is included with Aquarium admission.

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Some Truly Groundbreaking News From Malibu

06.29.2016 | Heal the Bay

Malibu / Pacific Palisades

June 29, 2016 — Heal the Bay celebrates a concrete win in the decades-long fight to clean up polluted beaches in Malibu.

Malibu is one of the most breathtaking and desirable places to live in Southern California, but it has a dirty little secret – septic systems in and around its cultural center have fouled nearby coastal waters for decades.

Malibu Creek, Malibu Lagoon, and the surrounding ocean, including Surfrider Beach, are critically polluted and numerous studies point to septic systems as a major contributor. Swimmers who recreate in these waters run the risk of all kinds of illnesses.

But today Heal the Bay staff and members celebrated an important milestone in what has been a long and protracted fight to reduce water pollution in Malibu – groundbreaking on a Civic Wastewater Treatment Facility.

For more than 15 years, Heal the Bay has called for the Malibu Civic Center’s septic systems to be replaced by a centralized wastewater treatment facility. It has been a long and bumpy road, with officials complaining about costs and some residents worried about the specter of development if sewers are put in. But our advocacy is finally starting to yield tangible results.

The Los Angeles Regional Water Quality Control Board adopted a Septic Prohibition in 2009 that required the phasing out by 2019 of all septic systems in the Malibu Civic Center Area (think Malibu Pier, Pepperdine, Malibu Bluffs Park). And in 2015 the Malibu City Council unanimously certified the Civic Center Wastewater Treatment Facility Final Environmental Impact Report and later secured funding for the facility.

Malibu City Councilmembers, along with members of the California State and Regional Water Control Board, were all in attendance today to put golden shovel to dirt.

“The facility will enable Malibu to protect the natural environment that we cherish, while meeting state mandates to end the use of septic systems in the Civic Center area and producing recycled water to reduce Malibu’s reliance on potable water,” said Laura Rosenthal, Malibu’s current mayor.

Ground breaking at Malibu It was especially gratifying to see Mark Gold, past Heal the Bay president and current board member, in attendance. Amid often fierce opposition from city officials and some Malibu property owners, Gold led the charge to demand an end to septic tanks in the Civic Center area for many years. He helped broker an MOU between the city and the regional water board that phased out septic tanks and mandated the building of a more modern treatment facility. (You can read more about his war wounds in one of his blog posts here.)

While today’s groundbreaking is a big step, the journey to better water quality is far from complete. Septic tanks are still in the process of being phased out and water quality in Malibu Creek, Malibu Lagoon, and local beaches isn’t likely to show improvement until the facility actually begins to treat local wastewater.

The wastewater treatment site is located at the intersection of Civic Center Way and Vista Pacifica. The facility will treat wastewater from properties in and around the Civic Center, and use the recycled water produced by the facility for irrigation of local parks and landscaping.

As the construction advances, we promise to remain vigilant and keep you updated.

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Wow! What an Amazing Weekend For the Earth

04.18.2016 | Heal the Bay

Culver City News

Apr. 18, 2016 — Heal the Bay is still feeling the stoke from Saturday’s Earth Month Extravaganza, which saw over 2,000 volunteers and ocean-lovers descend on Santa Monica Beach and our Aquarium to participate in the festivities.

Drum roll, please: Over 1,900 volunteers participated in our Earth Month Nothin’ But Sand beach cleanup this past Saturday, hauling in nearly 500 lbs. of ocean-bound trash! That’s a quarter-ton less trash polluting our coast, fouling our marine habitats, and harming wildlife. It was a tremendously good turnout for a hot day, and we’re incredibly grateful to everyone who showed up early on a Saturday morning to join us.

We’re also grateful for our partners who made the day possible. After all, it wasn’t just a beach cleanup, but a whole day of festivities, including free yoga, surf lessons, public programs at the Aquarium, and a sandcastle-building competition!

CorePower Yoga for providing free yoga on the beach and some great monthly passes
YogaSmoga for donating yoga apparel gift certificates
AquaSurf for providing free surf lessons
Starbucks for providing free coffee in reusable mugs
The North Face for bringing lots of volunteers and schlepping tons of stuff
HOK Product Design for facilitating the Sandcastle Competition
Montalba Architects, Tangram Interiors, DPR Construction, and Syska and Hennessy for building incredible sandcastles
Nicci Solomons, Justin Grant, and Bruna Schmitz for serving as our celebrity sandcastle judges
The Sock Panda (aka Jonathan Howard and Charlene Mayo) for donating fun socks to Aquarium visitors

As Earth Month winds down, we’d like to take a moment to reflect on all that we achieved in the last thirty days. Heal the Bay held over 30 outreach events, impacting communities all over Los Angeles including:

Downey	San Pedro	Pasadena
Burbank	Beverly Hills	Santa Monica
Malibu	Culver City	El Segundo
South Gate	Monterey Park	Los Angeles
Glendale	Northridge	Downtown LA
Westwood	Whittier	South LA
Torrance	Venice	Manhattan Beach
West Hollywood

Additionally, our Speakers Bureau held 34 lectures and there were 5 Corporate Healer Beach Cleanups! And we’ve added more than 750 pledges to uphold the Plastic Bag Ban! Much thanks to everyone for making this month such a success!

Thank you, everyone, and happy Earth Month to all!

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Dig Sand Crabs? Join Our Citizen Scientist Squad

11.18.2015 | Heal the Bay

Heal the Bay Aquarium Santa Monica

Nov. 19, 2015 — This blog was written by Taylor Spesak, Public Programs Intern, and Catherine Hoffman, Programs Coordinator, at our Santa Monica Pier Aquarium.

Beneath your toes at the beach are thousands of sand crabs just trying to make it through the day. Most beachgoers walk right over them without a care, but Santa Monica Pier Aquarium citizen scientists are eager to find them!

Heal the Bay recently partnered with the statewide LiMPETS program to bring sand crab monitoring to the Santa Monica shoreline just outside the Aquarium’s doors. This program activates people along the entire California coast to do real science through hands-on data collection.

But…why do we care about sand crabs? For starters, they can tell scientists a lot about the sandy beach ecosystem. For example, if there is a low number of crabs during a collection, water quality may be poor or a high number of predators may be snacking on the sand crabs. The list could go on and on. By simply counting these overlooked creatures, scientists can make conclusions about the entire ecosystem’s overall health.

Citizen scientists from the Aquarium are focusing on sand crabs specifically in the area around the Santa Monica Pier. We’re examining several factors that may be affecting the number of crabs present, like how long it’s been since a heavy rain and whether the sample spot is under the Pier. We’ve already noticed that there seem to be more crabs during dry spells and more crabs directly under the Pier.

The findings are intriguing, and we look forward to analyzing more data. That’s where you come in!

Experienced or not, anyone can be a citizen scientist, and we’d love to do science with you. As long as the tides are low, the surf isn’t too aggressive, and there is no rain we will be out collecting data every Wednesday at 3:00pm. No training required! Meet us at the Aquarium and we’ll then head down to the beach to collect our sand crabs. This program can also be used as a service or linked learning opportunity for middle and high school students. An AP Environmental Studies class from Los Angeles Academy of Arts and Enterprise has already helped us collect great data.

So come get crabby with us on Wednesday, November 25, at 3pm and kick off your citizen science career under the Pier!

For more information, please email Catherine Hoffman at choffman@healthebay.org.

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Thank You Thursday 11-5-15

11.04.2015 | Heal the Bay

Heal the Bay Aquarium Santa Monica

With a predicted El Niño “too big to fail” heading for Southern California, we proclaimed Oct. 11-17 El Niño Week to help us all understand what causes this meteorological phenomenon, offer tips to prepare, and explore the ways that expected heavy rains can be turned to our advantage. We have a number of folks and establishments to thank for their help and support in making El Niño Week a success.

Thanks to WaterLA’s Melanie Winter who led a conversation at our Santa Monica Pier Aquarium about water and land use in L.A and to RainReserve for demonstrating the myriad devices available for capturing rainwater.

We’re also grateful to Bill Patzert, a scientist at the California Institute of Technology’s NASA Jet Propulsion Laboratory (JPL) in Pasadena, for giving an informative and entertaining talk to a packed room at the Aquarium. Patzert managed to have the crowd in stitches as he explained the science behind an El Niño.

And finally, a huge thank you to the five local establishments that got into the spirit of the week by creating El Niño inspired cocktails and pledging a portion of the proceeds to Heal the Bay from each clever concoction sold throughout El Niño Week. Thanks to these restaurants: The Lobster, Cassia, Hotel Casa del Mar’s Terrazza Lounge, Locanda del Lago, and Rusty’s Surf Ranch.

We love Halloween and Dia de Los Muertos at Heal the Bay, and at our Aquarium we celebrate with a weekend-long Fishy Fest. The annual event is made all the more festive thanks to the City of Santa Monica’s Resource Recovery and Recycling division’s contribution of gently used and brand new costumes. A parade of ghosts and goblins along the Pier is a favorite feature of the weekend, and the trick or treating made all the sweeter by our participating neighbors: Rusty’s Surf Ranch, The Albright, Blazing Saddles, Bubba Gump Shrimp Co. and Pacific Park.

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