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State Water Boards Hazardous Substances Drinking Water

Best Best & Krieger LLP

California State Water Resources Control Board Issues New and Revised PFAS Advisory Levels

On October 29, 2025, the California State Water Resources Control Board’s Division of Drinking Water (State Water Board) issued new and revised notification levels and/or response levels for four per- and poly- fluoroalkyl...more

Nossaman LLP

Water Board Issues Draft Definition of Microplastics in Drinking Water

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The California State Water Resources Control Board (“State Water Board”) recently issued a draft Definition of Microplastics in Drinking Water and an accompanying staff report....more

Nossaman LLP

State Water Board Imposes Stricter Response Levels for PFOA and PFOS

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On February 6, 2020, the California State Water Resources Control Board lowered the response levels (RLs) for perflourooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), two of the most common compounds in the...more

Downey Brand LLP

PFAS Are Here: First Round of Results Show PFAS in California Drinking Water Supply Wells

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Results from the first phase of sampling drinking water supply wells for per- and polyfluoroalkyl substances (PFAS) were recently published by the California State Water Resources Control Board (State Water Board) and show...more

Downey Brand LLP

New Legislation Gives the California State Water Resources Control Board Expanded Authority to Order Testing for PFAS

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The State Water Resources Control Board (State Water Board) will have new, expansive authority to order public water systems to monitor for per- and polyfluoroalkyl substances (PFAS) under a new law, commonly referred to as...more

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