Friends of Gualala River Protecting the Gualala River watershed and the species living within it
May, 2025
by Timmarie Hamill, Director, The Stream Team
Brief summary:
“The results suggest runoff pollution primarily originates from gas stations, parking lots, and Highway 1. For instance, 6PPD-q levels ranged from 71 to 179 ng/L at the Gas Station, Parking Lot, and Footbridge sites, compared to 14 to 28 ng/L at the Above Trinks site. Zinc levels followed a similar pattern, ranging from 0.05 to 0.17 mg/L at the Gas Station, Parking Lot, and Footbridge sites, versus 0.03 to 0.04 mg/L at Above Trinks.
These findings highlight the need for enhanced mitigation efforts to reduce stormwater runoff and protect water quality in the estuary, which is critical for endangered coho, threatened steelhead, and other important species.”
Read the full report:
Results of testing Gualala stormwater for toxins
For more information, see:
FoGR and The Stream Team Find Tire Grit Toxin in Gualala’s Stormwater
