Office of Drinking Water Rules

You can view our rules online at the Office of the Code Reviser's (OCR) website, which allows you to search WACs and easily print individual sections.

If you want to download or print the entire chapter, you can click on the "Print" PDFs listed below.

Group A Public Water Supplies: Chapter 246-290 WAC

This rule sets requirements for Group A public water systems. The effective date is January 14, 2017. You can also download Code of Federal Regulations (PDF). The effective date is July 1, 2016.
OCR website | Print PDF

Group B Public Water Systems: Chapter 246-291 WAC

This rule sets requirements for Group B public water systems. The effective date is March 27, 2014.
OCR website | Print PDF

Waterworks Operator Certification: Chapter 246-292 WAC

This rule sets requirements for certified waterworks operators.The effective date is November 17, 2017.
OCR website | Print PDF

Water System Coordination Act: Chapter 246-293 WAC

This rule sets requirements to evaluate and determine critical water supply service areas, and coordinate public water system planning. The effective date is January 31, 1991.
OCR website | Print PDF

Drinking Water Operating Permits: Chapter 246-294 WAC

This rule sets requirements for Group A public water systems required to have an annual drinking water operating permit. The effective date is March 18, 2012.
OCR website | Print PDF

Satellite System Management Agencies: Chapter 246-295 WAC

This rule sets requirements for entities seeking approval to operate more than one public water system. The effective date is October 7, 1994.
OCR website | Print PDF

Drinking Water State Revolving Fund Loan Program: Chapter 246-296 WAC

This rulesets requirements for public water systems seeking funding assistance for infrastructure improvements. The effective date is October 4, 2018.
OCR website | Print PDF

Drinking Water Laboratory Certification and Data Reporting: Chapter 246-390 WAC

This rule sets requirements for labs to send data results to public water systems and the department of health. The effective date is May 14, 2018.
OCR website | Print PDF

Office of Drinking Water Fee Schedule (PDF)

This document contains the fee schedules for:

  • Group A and B public water systems, WAC 246-290-990;
  • Waterworks Operator Certification, WAC 246-292-995; and
  • Drinking Water Operating Permits, WAC 246-294-070.

For more information

For information about Office of Drinking Water's rule-making activities, please contact:

Theresa Phillips, Rules Project Manager, 360-236-3147