Washington legislation · 2025-26 Regular Session
Washington SB6291: On-site wastewater systems
Status: Signed into law, March 24, 2026
Concerning on-site wastewater treatment system inspections.
What the bill says
An act Relating to on-site wastewater treatment system inspections; and amending RCW 70A.105.110.
From the enrolled text:
AN ACT Relating to on-site wastewater treatment system inspections; and amending RCW 70A.105.110. Sec. 1. RCW 70A.105.110 and 2019 c 442 s 20 are each amended to read as follows: (1) The local board of health shall ensure that individuals who conduct inspections of on-site wastewater treatment systems as defined in RCW 18.210.010 or who otherwise conduct reviews of such systems are qualified in the technology and application of on-site sewage treatment principles. A certificate of competency issued by the state board of registration for professional engineers and land surveyors is adequate demonstration that an individual is competent in the engineering aspects of on-site wastewater treatment system technology. (2) A local board of health may allow noncertified individuals to review designs of, and conduct inspections of, on-site wastewater treatment systems ((for a maximum of two years after the date of hire, if a certified individual reviews or supervises the work during that time)), as defined in RCW 18.210.010, pursuant to this section under the supervision of a certified individual. Such supervised practice may continue for a maximum of four years after the date of hire. Passed by the Senate March 10, 2026. Passed by the House March 3, 2026. Approved by the Governor March 24, 2026. Filed in Office of Secretary of State March 25, 2026. --- END ---
Sponsors
- Liz Lovelett (D) · primary sponsor
- Sharon Shewmake (D)
Latest actions
- : Effective date 6/11/2026.
- : Chapter 210, 2026 Laws.
- : Governor signed.
- : Delivered to Governor.
- : Speaker signed.
- : President signed.
- : Passed final passage; yeas, 49; nays, 0; absent, 0; excused, 0.
- : Senate concurred in House amendments.
- : Third reading, passed; yeas, 93; nays, 0; absent, 0; excused, 5.
- : Rules suspended. Placed on Third Reading.
Votes
- Final Passage as Amended by the House (March 10, 2026): 49 yea, 0 nay, passed
- Final Passage as Amended by the House (March 3, 2026): 93 yea, 0 nay, passed
- House Committee on Environment & Energy: Do pass as amended (February 24, 2026): 18 yea, 0 nay, passed
- 3rd Reading & Final Passage (February 10, 2026): 48 yea, 0 nay, passed
- Senate Committee on Local Government: Do pass (February 2, 2026): 5 yea, 0 nay, passed
Subjects: ENVIRONMENTAL HEALTH AND SAFETY
Common questions
- What is SB6291?
- SB6291 is a bill in the Washington Legislature (2025-26 Regular Session): On-site wastewater systems.
- What does SB6291 do?
- In its own words: An act Relating to on-site wastewater treatment system inspections; and amending RCW 70A.105.110.
- What is the status of SB6291?
- Signed into law as of March 24, 2026. Latest action: Effective date 6/11/2026. (March 24, 2026).
- Who sponsored SB6291?
- Liz Lovelett (D), with 1 co-sponsor.
- Where is the official record for SB6291?
- On the Washington Legislature website: https://app.leg.wa.gov/billsummary?BillNumber=6291&Year=2025
Source: official Washington record. Tracked by Delilah, AI for legislation across all 50 states and Congress.