WAC 173-201A-100: Mixing Zones

Notes

Washington Administrative Code regulation governing mixing zones for surface water discharges in Washington State. The regulation establishes size limits, conditions, and requirements for mixing zones in rivers, streams, estuaries, lakes, and oceanic waters, including rules for acute criteria exceedance zones, overlapping mixing zones, storm water discharges, and combined sewer overflows. Dischargers must fully apply AKART and demonstrate that mixing zones will not harm sensitive habitats, ecosystem, or public health.

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