Concerning environmental crimes.
Senate Bill 5360 establishes new criminal offenses related to water pollution in Washington state, affecting individuals and various entities, including government agencies. The bill defines three degrees of violation for the water pollution control act, differentiating them by the level of intent and harm. A first-degree violation involves knowingly causing imminent danger, a second-degree violation involves knowingly violating without imminent danger, and a third-degree violation involves negligent violations. Each degree carries specific penalties, ranging from a Class B felony for the first degree to a gross misdemeanor for the third degree.
Bill status
passed
3 of 5 stages cleared
Introduction
Jan 2026
Committee Review
Feb 2026
Senate Passage
Feb 2026
House Passage
Governor
Introduced Jan 12, 2026
Last action Mar 12, 2026
Maddy AI version diff · 3 comparisons
What changed between versions
Substitute Bill
→
Engrossed Substitute Bill
·
4 edits
·
Feb 17, 2026
MODERATE
This bill updates the definitions and penalties for environmental crimes in Washington State, specifically regarding water pollution, air pollution, and hazardous waste. The most significant change is the replacement of the old, vague definition of 'knowingly' with a precise legal definition from state criminal law, ensuring consistent application of intent in prosecutions. Additionally, the bill adds specific exemptions for construction stormwater and wildfire management activities, and clarifies the hierarchy of offenses to align with updated state sentencing guidelines.
Scope change
The bill's scope remains focused on environmental crimes, but its applicability is refined by adding specific exemptions for construction stormwater permits and authorized wildfire mitigation activities, which were previously not explicitly excluded.
DEFINITION
Replaced the custom definition of 'knowingly' with the standard legal definition from RCW 9A.08.010 to ensure consistent interpretation of intent across all environmental statutes.
Reorganized and renumbered sections to reflect the new structure of the bill, shifting the order of offenses from water, air, and hazardous waste to air, water, and hazardous waste.
REQUIREMENT
Added explicit exemptions for silt and sediment discharges under construction stormwater permits and for outdoor burning conducted to reduce wildfire risk or improve ecosystem health.
ENFORCEMENT
Updated penalty classifications and descriptions to align with current state sentencing laws, clarifying the distinction between felonies and gross misdemeanors for different levels of negligence.
Floor votes · Senate Mar 4, 2025
How they voted
31–20
Passed
Total votes 51
Mar 4, 2025
D
Democratic31
96% Yea
R
Republican20
95% Nay
Vote distribution
All Yea
All Nay
Mixed
No data
Full legislative history
Actions timeline
Total actions
31
Key actions
13
Committee
12
Feb 23, 2026
Lower · Passed
Public hearing in the House Committee on Environment & Energy at 1:30 PM.
lower
Feb 17, 2026
Upper · Passed
Floor amendment(s) adopted.
upper
Jan 12, 2026
Introduced
By resolution, reintroduced and retained in present status.
upper
Apr 5, 2025
Lower · Passed
Public hearing in the House Committee on Appropriations at 9:00 AM.
lower
Apr 2, 2025
Committee
Referred to Appropriations.
lower
Mar 31, 2025
Lower · Passed
Minority; without recommendation.
lower
Mar 31, 2025
Lower · Passed
Minority; do not pass.
lower
Mar 31, 2025
Lower · Passed
ENVI - Majority; do pass with amendment(s).
lower
Mar 31, 2025
Lower · Passed
Executive action taken in the House Committee on Environment & Energy at 1:30 PM.
lower
Mar 13, 2025
Lower · Passed
Public hearing in the House Committee on Environment & Energy at 10:30 AM.
lower
Mar 4, 2025
Upper · Passed
Floor amendment(s) adopted.
upper
Feb 7, 2025
Upper · Passed
Minority; without recommendation.
upper
Feb 7, 2025
Upper · Passed
Minority; do not pass.
upper
Feb 7, 2025
Upper · Passed
Executive action taken in the Senate Committee on Environment, Energy & Technology at 10:30 AM.
upper
Jan 24, 2025
Upper · Passed
Public hearing in the Senate Committee on Environment, Energy & Technology at 10:30 AM.
upper
1 primary · 6 co-sponsors
Sponsors
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