SB 5033 Washington Senate · 2025-2026 Regular Session

Concerning sampling or testing of biosolids for PFAS chemicals.

Senate Bill 5033 establishes requirements for sampling and testing biosolids for PFAS chemicals in Washington state. It directs the Department of Ecology to issue guidance on PFAS sampling for facilities that generate biosolids by July 2026. These facilities will then be required to conduct quarterly PFAS chemical testing of their biosolids from January 2027 to June 2028, submitting the results to the department. Septic tank sludge is excluded from these specific sampling requirements. Based on the collected data, the Department of Ecology must report to the legislature by July 2029 with a summary of PFAS levels and recommendations for future actions.

Issues: ✓ Environment

Bill status signed all 5 stages cleared

Introduction

Dec 2024

Committee Review

Apr 2025

Senate Passage

Apr 2025

House Passage

Apr 2025

Signed into Law

May 2025

Introduced Dec 13, 2024 Signed May 17, 2025

Maddy AI version diff · 2 comparisons

What changed between versions

Substitute Bill → Substitute Passed Legislature · 6 edits

MODERATE

The bill was amended to accelerate PFAS testing requirements for biosolids, moving the deadline from 2028 to 2026 and mandating quarterly testing starting in 2027. It also shortened the timeline for the advisory committee's formation and adjusted the reporting deadline to align with the new testing schedule. These changes aim to ensure faster detection and management of PFAS chemicals in wastewater treatment byproducts.

Scope change

The bill's scope regarding PFAS testing remains applicable to facilities generating biosolids, but the specific compliance timelines and testing frequencies have been tightened.

TIMELINE

The deadline to establish PFAS sampling requirements was moved from July 1, 2028, to July 1, 2026.

The deadline for facilities to submit sampling results to the department was advanced to September 30, 2028.

The department's deadline to submit a final analysis and recommendations report was moved from December 1, 2029, to July 1, 2029.

The requirement to convene the advisory committee was moved from an unspecified date before rule adoption to a fixed deadline of September 30, 2028.

REQUIREMENT

Facilities must now sample for PFAS chemicals quarterly starting January 1, 2027, instead of waiting for future guidance.

The specific laboratory testing method was updated to require EPA method 1633A as it existed in December 2024.

Floor votes · Senate Apr 17, 2025 · House Apr 10, 2025

How they voted

51–0

Passed

Total votes 51

Apr 17, 2025

D Democratic31

31 Yea

100% Yea

R Republican20

20 Yea

100% Yea

Vote distribution

All Yea All Nay Mixed No data

Full legislative history

Actions timeline

Total actions

Key actions

Committee

May 17, 2025

Signed into law

Governor signed.

executive

Apr 22, 2025

Lower · Passed

Speaker signed.

lower

Apr 19, 2025

Upper · Passed

President signed.

upper

Apr 17, 2025

Upper · Passed

Passed final passage; yeas, 49; nays, 0; absent, 0; excused, 0.

upper

Apr 17, 2025

Upper · Passed

Senate concurred in House amendments.

upper

Apr 10, 2025

Lower · Passed

Committee amendment(s) adopted with no other amendments.

lower

Apr 10, 2025

House · Passed

House Vote: pass (97-0-3)

house

Apr 8, 2025

Committee

Referred to Rules 2 Review.

lower

Apr 5, 2025

Lower · Passed

APP - Majority; do pass with amendment(s).

lower

Apr 5, 2025

Lower · Passed

Executive action taken in the House Committee on Appropriations at 9:00 AM.

lower

Apr 3, 2025

Lower · Passed

Public hearing in the House Committee on Appropriations at 1:30 PM.

lower

Mar 26, 2025

Committee

Referred to Appropriations.

lower

Mar 24, 2025

Lower · Passed

Minority; without recommendation.

lower

Mar 24, 2025

Lower · Passed

ENVI - Majority; do pass.

lower

Mar 24, 2025

Lower · Passed

Executive action taken in the House Committee on Environment & Energy at 1:30 PM.

lower

Mar 17, 2025

Lower · Passed

Public hearing in the House Committee on Environment & Energy at 1:30 PM.

lower

Feb 27, 2025

Upper · Passed

WM - Majority; do pass 1st substitute bill proposed by Environment, Energy & Technology.

upper

Feb 27, 2025

Upper · Passed

Executive action taken in the Senate Committee on Ways & Means at 1:30 PM.

upper

Feb 24, 2025

Upper · Passed

Public hearing in the Senate Committee on Ways & Means at 1:30 PM.

upper

Feb 19, 2025

Committee

Referred to Ways & Means.

upper

Feb 18, 2025

Committee

And refer to Ways & Means.

upper

Feb 18, 2025

Upper · Passed

Minority; without recommendation.

upper

Feb 18, 2025

Upper · Passed

Executive action taken in the Senate Committee on Environment, Energy & Technology at 1:30 PM.

upper

Feb 7, 2025

Upper · Passed

Public hearing in the Senate Committee on Environment, Energy & Technology at 10:30 AM.

upper

Jan 21, 2025

Committee

Referred to Environment, Energy & Technology.

upper

Jan 20, 2025

Committee

And refer to Environment, Energy & Technology.

upper

Jan 20, 2025

Upper · Passed

Executive action taken in the Senate Committee on Local Government at 1:30 PM.

upper

1 primary · 10 co-sponsors