California water board approves Bay-Delta plan with flexible rules

California’s State Water Resources Control Board voted 4-1 to approve major updates to a massive water plan for the San Francisco Bay/Sacramento-San Joaquin Delta. The watershed supplies drinking and municipal water to approximately 30 million people and provides irrigation water for 4 million acres. The decision follows years of updates and two days of public comment.

The newly approved framework diverges from past practices that required all water agencies to limit pumping to preserve minimum water levels. Under the updated plan, agencies can choose a voluntary agreement path through the Healthy Rivers and Landscapes program. This approach provides flexibility in required water diversions while mandating that agencies fund projects to improve flows, restore floodplains, and enhance fish habitats.

How the Two Regulatory Paths Work

The voluntary agreement path was endorsed by Governor Gavin Newsom along with agricultural agencies, city water providers, and business groups. Several water agencies expressed intent to use these agreements. However, if agencies do not sign on, a second regulatory path requires them to maintain a minimum level of unimpaired flows year-round, subject to water conditions.

Opposition From Tribes and Conservationists

Numerous speakers, including tribal members and conservation advocates, strongly opposed the changes. Jon Rosenfield and Christie Ralston of the San Francisco Baykeeper argued that voluntary agreements would fail to reverse declining fish populations and that flow levels would remain inadequate and harmful. Tribal members testified that algae blooms and low water levels have disrupted traditional water ceremonies and restricted waterways used for sustenance.

What This Means for Affected Communities

For municipal water providers, agricultural agencies, and conservation groups, the updated plan introduces a choice between voluntary habitat-restoration commitments and mandatory year-round flow standards. Residents and tribal groups who rely on the watershed must monitor how water agencies implement these paths. The board also tweaked the plan to include a specific information-gathering process for the Trinity River following concerns raised by tribal speakers.

Individuals or groups concerned about water rights, environmental impacts, or watershed health may want to track ongoing board decisions, review public filings, and consult a qualified water attorney to understand their options.

This article is general information based on Courthouse News Service and court or agency records available at publication time. It is not legal advice; laws and deadlines differ by state and by case. Published October 30, 2026.