2023 Washington Code 70A.130.020 – Establishment of monitoring requirements for chemical contaminants in public water supplies by state board of health

2022 Washington Code 70A.130.020 – Establishment of monitoring requirements for chemical contaminants in public water supplies by state board of health

2020 Washington Code 70A.130.020 – Establishment of monitoring requirements for chemical contaminants in public water supplies by state board of health