SEATTLE – On April 16, 2020, EPA finalized the withdrawal of certain federal human health criteria (HHC) water quality standards in the state of Washington because they are no longer needed following the agency’s 2019 approval of certain standards that the state submitted to EP
from EPA News Releases https://www.epa.gov/newsreleases/epa-clears-way-state-washington-implement-its-own-water-quality-standards
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