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Chapter 173-230 WAC

Ecology is beginning a new rulemaking for Chapter 173-230 WAC Certification of Operators of Wastewater Treatment Plants. As part of this rulemaking we will be focusing on the following:
  • Establishing a fee schedule to replace existing fee requirements.
  • Revising:
    • Definitions.
    • Rule language for new treatment technologies.
  • Providing for an Operator in Training and respective education and experience qualifications for groups II-IV.
  • Updating professional growth requirements.
  • Revising language regarding revocation and suspension of a certificate.
  • Reorganizing and clarifying rule language.
  • Other edits identified or necessary to support the above items, the overall objectives of the statute or chapter, or the goals of the program.

Rulemaking timeline


Announcement phase (CR-101)

Filing date:
Jun. 22, 2018

Announcement documents

Rule development phase

June 22, 2018 - March 2019

Public input & involvement

September 6, 2018 Rule Advisory Committee Meeting
9:30 AM - 2:30 PM
Lacey Community Center
6729 Pacific Ave SE
Olympia, WA 98503
October 6, 2018 Rule Advisory Committee Meeting
St. Placid Priory
500 College St NE
Lacey, WA 98516

Mid-October through

Mid-November 2018

Informal Comment Period

Additional languages

Español (Spanish) 中文 (Chinese) Tiếng Việt (Vietnamese) 한국어 (Korean)


To request ADA accommodation for disabilities, or printed materials in a format for the visually impaired, call Hanna Waterstrat at 360-407-7668 or email hanna.waterstrat@ecy.wa.gov. Persons with impaired hearing may call Washington Relay Service at 711. Persons with speech disability may call TTY at 877-833-6341.