Versions of Washington Code 70A.120.030 - Certified operators required for certain public water systems on LawServer 2023 Washington Code 70A.120.030 – Certified operators required for certain public water systems 2022 Washington Code 70A.120.030 – Certified operators required for certain public water systems 2020 Washington Code 70A.120.030 – Certified operators required for certain public water systems
