Stream Team Summer 2024: The Next Wave of Water Quality Researchers

Freshwater sites in L.A. County suffer from fecal indicator bacteria (FIB) pollution, indicating harmful pathogens that can lead to serious illness. FIB pollution often stems from urban runoff, illegal discharges, and leaks from failing wastewater systems. In response to the lack of publicly available information, Heal the Bay launched monitoring efforts in 2014, culminating in the River Report Card (RRC) in 2017, to keep freshwater sites safe for recreation.

The RRC offers free, weekly water quality grades for 35 freshwater recreation sites, providing essential information to safeguard public health. In addition to these weekly updates, Heal the Bay releases an annual report each summer.

The program also supports local students through the Stream Team initiative, which trains participants in field and lab techniques to prepare them for STEM careers. Since its inception, 57 students have contributed to monitoring efforts, expanding from Malibu Creek State Park to the L.A. River Watershed and beyond, including storm drain testing in the Elysian Valley, where dry weather urban runoff enters the river via storm drains. This initiative aims to identify and address potential sources of contamination that could impact water quality in the L.A. River and surrounding environments.

2024 Lower LA River Stream Team (from left to right: Vina Rose Matias, Emily Uy, Danny Herrera, Zaria Alam, and Ellie Garcia)

Summer 2024 Recap

Heal the Bay welcomed 14 students from colleges across Southern California for the Stream Team internship this summer. Over 16 weeks, the team collected over 150 water samples and evaluated nearly 700 water quality grades, revealing trends at 35 testing locations monitored by HTB, SGRMP, and LA Environment and Sanitation (LASAN). Grades this summer were similar to past summers, with sites higher in the watershed, such as the San Gabriel River locations, receiving better grades and sites lower in the watershed, such as the lower L.A. River, receiving worse grades.

In addition to hands-on training, interns engaged in science communication, writing blog posts about their experiences, and participating in community events like the Friends of the Los Angeles River Festival. They also learned about career opportunities in environmental science from guest speakers and researchers at the EPA, LA Water Quality Control Board, and U.C. Riverside.

Heal the Bay monitors water quality through these efforts and cultivates the next generation of environmental stewards. For the latest grades, visit the River Report Card website. A full report will be available early next year.

Students provided insight on their favorite sections of the LA River:

“My favorite part of the LA River is the Lower LA River. It’s definitely not the cleanest, as illustrated in the grades these sites often receive, and not the most visually appealing. However, I find it’s incredibly diverse with both flora and fauna. The bird species in particular, especially at Willow, were always abundant. There was definitely a lack of human activity most likely due to sanitation and lack of aesthetics for recreational use, but that didn’t stop the river from doing its job for the other inhabitants of LA. I especially liked collecting field data at Willow because it was a hotspot for a variety of shorebirds.” – Ellie Garcia, Lower LA River Team

“My favorite part of the L.A. River is around Frogtown. There are a lot of people walking around, biking, enjoying nature, and the businesses adjacent to the river. I also appreciated how busy the area is throughout the day. We usually start at 8 AM and end at 12 PM collecting samples and the area is never quiet or empty.” – Vicente Villasenor, Upper LA River Team

“My favorite part of the LA River is how quickly it can change. The one I’d see change significantly every week was Sepulveda Basin, making it my favorite sampling site. Every week I noticed it became lusher than it had been the first time we visited the site.” – Kate Medrano, Upper LA River Team.

Students also shared what they learned about these urban waterways and water quality testing, and the importance of this water to the communities of humans and other species who live in and around the river:

“I learned more about how the river is an essential part for the community. I understood already that the river is important for wildlife. If its quality goes down, it has a domino effect on the environment. This season I learned that the domino effect also affects the community. I used to view the lower LA river as a sewage line, but while taking samples this season, I seen that it is also used for recreation. For example, people run, ride their bikes, and walk their dogs along the river. People also bird watch. I believe this further brings reason on why we need policy to protect this river and make it better. It’s vital in uplifting our community further.” – Vina Rose Matias, Lower LA River Team

“As a second-year intern, I was already quite familiar with the sampling process. However, this season we accounted for the different bird species present in the Lower LA River in our field data. I learned more about the migration patterns of native and non-native birds that call LA home and experienced the visual difference of biodiversity that came along with this. With this, I learned just how important the LA river is to these migratory birds. It acts almost like a home base for those that nest in this area. My most interesting finding had to be the Egyptian Geese we ran into during the end of our sampling season. They were very vocal, very colorful, and a bit too bold with people! They got a little too close while during sampling in Willow, which was interesting!” – Ellie Garcia, Lower LA River Team

Impact

Heal the Bay has maintained strong partnerships with the State Water Resource Control Board’s Clean Water Team, Los Angeles Trade Technical College, and California State University Long Beach. These collaborations have expanded our programs, providing essential laboratory resources and expertise while actively recruiting students for our Stream Team. This initiative equips students with practical skills and empowers them as future environmental leaders.

UC Riverside graduate researcher John Perna explains to the Stream Team how microplastics collection and research is completed along the LA River.

Through our partnerships, Heal the Bay improves understanding of water quality issues and advocates for public health measures. Our data collection has led to enhanced monitoring by LASAN and the establishment of a dedicated webpage by the L.A. County Department of Public Health for freshwater recreation areas.

Heal the Bay continues to push for legislation that mandates comprehensive water quality testing at freshwater sites, similar to existing beach testing standards. In 2021, we took a significant step forward with the successful sponsorship of AB 1066, which aims to establish a statewide water quality monitoring program at freshwater recreation areas.

Support Heal the Bay’s mission to champion the next generation of environmental stewards.