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San Francisco Bay Water Board adopts nutrient limits after decade of monitoring and two large blooms
Summary
The San Francisco Bay Water Board told the coordinating committee it adopted a 2024 permit establishing interim and final nitrogen controls—aimed at a bay‑wide 40% load reduction from a 2022 baseline—after years of regional monitoring, joint science and stakeholder engagement following large harmful algal blooms.
The San Francisco Bay Regional Water Board presented its multi‑year nutrient management initiative and the board‑level decision last summer to adopt numeric limits for wastewater dischargers to the Bay.
A regional staff member described how the program began in 2010 with monitoring and collaborative science because historically the Bay resisted algal blooms due to turbidity and tidal mixing. After harmful heterosigma blooms in 2022 and 2023 that produced widespread fish kills, staff concluded there was reasonable potential for municipal…
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