Governing Law and Regulations
Washington Department of Ecology (WDOE) Water Quality Program
U.S. Environmental Protection Agency (EPA) Region 10
See ADDRESSES & CONTACTS for addresses and telephone numbers.
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. Washington has been delegated authority from EPA to administer the pretreatment program in the state. To find the applicable requirements for a specific facility, users must contact the pretreatment coordinator in the region where the facility is located (southwest, northwest, central, and eastern).
Washington requires a permit for industrial facilities discharging wastewater into publicly owned treatment works (POTWs). Industrial facilities that discharge into a POTW must pretreat their wastewater using technology-based standards. See the national section PRETREATMENT STANDARDS for additional guidance.
For a given facility, state waste discharge permit requirements and NPDES permit requirements are, under normal circumstances, contained in a single permit document.
The state has also developed additional requirements for biosolids management, including permitting.
• Administration and enforcement. WDOE's Water Quality Program is responsible for the administration and ...