Water Quality

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!

Clam Beach’s dirty water makes annual Beach Bummer list; New study finds birds are the source

Once again, Humboldt County’s Clam Beach has been ranked as one of the state’s 10 worst beaches when it comes to water quality.
According to Heal The Bay’s 2020-21 beach report card, Clam Beach at Strawberry Creek is the seventh worst in the state. The environmental nonprofit’s Beach Bummer list ranks the state’s 10 most polluted beaches according to water sampling data.

Clam Beach has posted failing summer dry grades in seven out of the last 11 years Heal The Bay has published its report cards.

Humboldt Baykeeper director Jennifer Kalt said strong evidence indicates high levels of bacteria in the ocean waters can be linked to birds, as opposed to bacteria originating from cattle in the freshwater stream.

“Even though the levels of bacteria are high enough to get an F grade on the Beach Bummer list, the genetic analysis shows (the bacteria) is primarily from birds,” she said. “And so, in the ocean, you have the influence of birds because there’s so many birds at the beach.”

Jolly Giant Creek Bacteria Study Delayed by COVID-19

This winter, we continued our bacteria pollution study with the goal of identifying the sources of fecal bacteria at six sites in Jolly Giant Creek in Arcata. This Humboldt Bay tributary was flagged for further investigation due to the frequency of human genetic material in samples taken near Samoa Blvd. during the Regional Water Board's Coastal Streams Pathogens TMDL Project.

COVID-19 update: Our sampling event scheduled for April 6 has been delayed due to both safety concerns and limited lab capacity. Our extraordinairy colleagues at the Humboldt County Public Health Lab are working diligently to analyze COVID-19 samples. We will resume our Jolly Giant Creek Bacteria Source Study as soon as it is safe to do so.

Water Quality in Two Humboldt Bay Tributaries

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.

Clam Beach Named Most Polluted in State

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.

Regional board recommends 6 North Coast waterways for impairment listing

8/15/14

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.