Drinking Water Laboratory Certification and Data Reporting

Chapter 246-390 WAC, Drinking Water Laboratory Certification and Data Reporting, establishes standards and requirements for environmental laboratories that analyze drinking water samples to help assure safe and reliable drinking water and to protect public health

On October 13, 2021, the Board adopted amendments to chapter 246-390 WAC. In concurrent action, the Board adopted amendments to chapter 246-290 WAC, Group A Public Water Supplies. Among other features, the amended rules establish:

  • drinking water standards for five per- and polyfluoroalkyl substances (PFAS) as State Action Levels (SALs);
  • requirements for monitoring, recordkeeping, reporting, and other follow-up actions;
  • criteria and procedures for adopting SALs and state Maximum Contaminant Levels (MCL); and
  • laboratory analytical and reporting requirements that align the two rules.

The revised rules took effect January 1, 2022.

CR-101 filed on February 11, 2020 as WSR 20-05-032
CR-102 filed on August 3, 2021 as WSR 21-16-094
Cr-103 filed on November 17, 2021 as WSR 21-23-096

Statutory Authority: RCW 43.20.050
State Board of Health Contact: Shay Bauman, 564-669-8929
State Department of Health Contact: Nina Helpling, 360-236-3065

Related Links: Meeting Materials