Washington Characteristic Waste regulations & environmental compliance analysis

Washington Characteristic Waste: What you need to know

Governing Law and Regulations

Dangerous waste designation: Washington Administrative Code (WAC) 173-303-070 to 173-303-100

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Dangerous waste characteristics: WAC 173-303-090

Sampling methods: WAC 173-303-110

Test methods: WAC 173-303-910

Regulatory Agency

Washington Department of Ecology (WDOE) Hazardous Waste and Toxics Reduction Program

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. EPA categorizes wastes as hazardous waste or as acutely hazardous waste. WDOE categorizes its hazardous waste as dangerous waste, extremely hazardous waste, and special waste. In Washington, a waste that exhibits any of the dangerous waste characteristics under WAC 173-303-090 must be assigned the dangerous waste number corresponding to the characteristics exhibited by the waste.

Administration and enforcement. WDOE's Hazardous Waste and Toxics Reduction Program administers and enforces the characteristic waste rules in Washington.

State Requirements


WAC 173-303-090

Washington requires additional tests to the federal testing criteria of reactivity, corrosivity, ignitability, and toxicity for classifying dangerous waste and extremely hazardous waste as characteristic wastes. WDOE requires testing as set forth in WAC 173-303-110 to determine whether the waste is designated under the state dangerous waste lists, characteristics, or criteria (WAC 173-303-080 to 173-303-100). For additional information on state testing for characteristic waste, see the state section HAZWASTE DETERMINATION (CLASSIFICATION).

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Washington Characteristic Waste Resources

Type Title
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