Water Quality Standards; Establishment of a Numeric Criterion for Selenium for the State of California
water-quality · Rule · Published 2024-12-17 · Effective 2025-01-16 · CA · 89 FR 101914
Document
Document number
2024-29483
Federal Register citation
89 FR 101914
CFR reference
40 CFR 131
Type
Rule
Action
Final rule.
Category
water-quality
Publication date
2024-12-17
Effective date
2025-01-16
State
CA
EPA docket
EPA-HQ-OW-2018-0056
Abstract
The Environmental Protection Agency (the EPA or the Agency) is amending a Federal Clean Water Act (CWA) rule, the California Toxics Rule, to promulgate a final, revised statewide chronic freshwater selenium water quality criterion applicable to certain California waters to protect aquatic life and aquatic-dependent wildlife from exposure to toxic levels of selenium. This revised criterion builds upon the science underlying the EPA's current national CWA section 304(a) recommended aquatic life freshwater criterion for selenium.