
California's progress removing single-walled storage tanks
Leaking fuel and hazardous waste can pollute our water systems. Single-walled storage tanks must close by January 1, 2026.
99.9% of these tanks are now closed.
January 6, 2026
Notice | Program Page
January 7, 2026
Revised Notice | Aviso Revisado
Remote Meeting - Information on how to participate in State Water Board meetings remotely

Leaking fuel and hazardous waste can pollute our water systems. Single-walled storage tanks must close by January 1, 2026.
99.9% of these tanks are now closed.
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The State Water Board is developing and implementing new regulatory programs to address potential water quality and quantity issues related to cannabis cultivation.
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Water is a precious resource in California, and maintaining its quality is of utmost importance to safeguard the health of the public and the environment.