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SB 466

Drinking water: primary standard for hexavalent chromium: exemption.

2025-2026 Regular Session Introduced by Anna Caballero and 2 co-sponsors

SB 466 exempts certain small or disadvantaged California water systems from hexavalent chromium drinking water standards under specified conditions.

Chaptered by Secretary of State. Chapter 320, Statutes of 2025.
#drinkingwater #exemption #primarystandardforhexavalentchromium
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Bill Summary · SB 466

Legislative bill overview

SB 466 exempts certain water systems from California's primary drinking water standard for hexavalent chromium (a carcinogenic chemical) under specific conditions. The bill allows small or disadvantaged water systems to delay compliance with the hexavalent chromium standard if they meet defined criteria and follow prescribed procedures.

Why is this important

Hexavalent chromium is a known human carcinogen linked to lung cancer and other health risks. This exemption directly affects public health protections by potentially allowing continued exposure to this contaminant in some California communities, particularly smaller or economically disadvantaged water systems that may struggle with compliance costs.

Potential points of contention

  • Public health vs. economic burden: The exemption prioritizes cost relief for small water systems over immediate protection from a known carcinogen, creating tension between health standards and affordability
  • Disproportionate impact on vulnerable populations: Exemptions may allow disadvantaged communities—already facing environmental justice concerns—to experience longer exposure to hexavalent chromium
  • Enforcement and timeline concerns: The exemption's conditions and duration determine whether systems eventually comply or receive indefinite relief, which could undermine the original standard's protective intent

Compiled from official sources — confirm details with the bill’s official record.

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