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Water: California Toxics Rule

Establishment of Numeric Criteria for Priority Pollutants for the State of California

California Toxics Rule (CTR); Final

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We promulgated numeric water quality criteria for priority toxic pollutants and other water quality standards provisions to be applied to waters in the State of California. We promulgated this rule based on the Administrator's determination that the numeric criteria are necessary in the State of California to protect human health and the environment.

Note: EPA no longer updates this information, but it may be useful as a reference or resource.

Proposed Rule


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