The San Mateo Resource Conservation District (RCD) is seeking volunteers for this year’s First Flush water quality monitoring event, the largest annual community science effort of its kind in our region. No experience is necessary!
Each fall, the first significant rains wash months of accumulated pollutants from our streets and landscapes into creeks, storm drains, and the ocean. This moment, known as First Flush, provides a rare chance for scientists and volunteers to understand how these pollutants move through our watershed—and how they impact both people and wildlife.
Volunteers will:
Collect water samples at designated sites from Pacifica to Half Moon Bay
Record field data to help track pollutants such as bacteria, metals, suspended solids, and nutrients
Contribute to long-term data that helps inform science and stewardship of our local waters
Training sessions:
Virtual Training: Wednesday, September 10, 6:30 PM (recorded for later viewing)
In-person Training: Saturday morning, September 13 (hands-on practice; video also available)
For more background on why this work matters, we invite you to watch our recent Coastside Land Trust webinar, Healthy Waters, Thriving Coast, featuring Kellyx Nelson and Clifton Herrmann of the San Mateo RCD. In this program, they share insights on local water quality, sources of pollution, and how science and community monitoring help protect our coast.
Email FirstFlush@sanmateoRCD.org with any questions