Query laboratories by name, location and/or accredited parameter

NOTE:  The below information is not on a real time basis. 

Accreditation in the “S” matrix (solids/chem materials) can be used for testing both water and solid samples under the Model Toxics Control Act (MTCA, see 173-340-830 WAC for approved methods). Accreditation in the “S” matrix is required for testing Biosolids (see 173-308-140 WAC for approved methods). Accreditation in the “N” matrix (non-potable water) is required for testing samples for National Pollutant Discharge Elimination System compliance (NPDES, 40 CFR 136, see 40 CFR 136.3 for approved methods). Accreditation in the “D” matrix (drinking water) is required for testing samples for Safe Drinking Water Act compliance (SDWA, 40 CFR 141, see Drinking Water Methods).

Last Updated:  11/9/2012

Contact the Lab Accreditation Unit if more recent information is needed.  Telephone (360) 895-6145.

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