Since 2005, our Water Quality Program has documented conditions of local streams and sloughs to identify problem areas for future monitoring and to pinpoint pollution sources so we can work to reduce or eliminate them. Thanks to the dozens of dedicated volunteers and partners who help make our program successful!    

Humboldt Baykeeper works with Dr. Margarita Otero-Diaz, an Assistant Professor at Humboldt State University's Environmental Resources Engineering Department, and her students to design and implement water quality monitoring projects in local waterways. 

In Spring 2021, students Claire Bareilles, Katherine Hardaker, and Caleb Wegener monitored water quality at five sites in two Humboldt Bay tributaries (Jacoby Creek and Martin Slough).

They presented their findings at the 12th annual CSU Water Resources and Policy Initiatives Conference. 

Click HERE to enlarge the image.

August/September 2017

Last month, Heal the Bay’s annual Beach Report Card named Clam Beach the most polluted beach in California due to bacteria levels measured at the mouth of Strawberry Creek. Clam Beach has made the Top Ten “Beach Bummers” list for four years running, but this is the first time it’s been Number One. And this year, Luffenholtz Beach in Trinidad was the eighth most polluted in the state.

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Using Humboldt Baykeeper’s 2005-2009 Citizen Water Monitoring data, the North Coast Regional Water Quality Control Board staff recently recommended six waterways for listing under Section 303(d) of the Clean Water Act due to bacterial pollution (E. coli).

Photo: Children play in Little River at Moonstone Beach, one of the waterways recommended for listing. March 22, 2014.


The North Coast Regional Wa­ter Quality Board on Thursday recommended that six local wa­terways be federally listed as im­paired due to high fecal bacteria concentrations, paving the way for those streams and rivers to obtain government-backed pol­lution control plans. “I’m pleased that the regional board took this action, which is a first step to addressing water quality impairments in the North Coast region,” board Executive Of­ficer Matt St. John said.

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