Washington Statewide Rule

Washington State Maximum Environmental Noise Limits

Some RestrictionsApplies statewide across Washington (2026)

Washington's Noise Control Act sets statewide maximum environmental noise levels by zone, with stricter nighttime limits between 10 p.m. and 7 a.m. that apply to all jurisdictions.

Key Facts

Statute: RCW 70.107 / WAC 173-60
Night limit: 10 p.m. to 7 a.m.
Residential cap: 55 dBA day, 45 dBA night
Civil penalty: Up to $100 per day

Source: Washington State Legislature

Full Breakdown

Under RCW 70.107 and WAC 173-60, Washington adopted Maximum Environmental Noise Levels (EDNA) categorized by source and receiving zoning district. Residential receiving properties have a daytime limit of 55 dBA from another residential source, dropping 10 dBA between 10 p.m. and 7 a.m. Cities may adopt local rules that are at least as stringent, but the state framework is the floor. Ecology administers, and local police or health departments enforce.

Violations & Penalties

Noise exceeding the EDNA limits can trigger civil penalties up to $100 per day per violation, plus injunctive relief and abatement orders.

Frequently Asked Questions

Does the state quiet-hour rule apply in every Washington city?

Yes. The WAC 173-60 nighttime reduction is a statewide floor. Cities may add stricter local hours but cannot weaken the state limits.

Who enforces the state noise limits?

Local law enforcement, code officers, or local health jurisdictions enforce the EDNA, with Ecology providing oversight and technical support.

Sources

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Full Breakdown

Frequently Asked Questions

Does the state quiet-hour rule apply in every Washington city?

Yes. The WAC 173-60 nighttime reduction is a statewide floor. Cities may add stricter local hours but cannot weaken the state limits.

Who enforces the state noise limits?

Local law enforcement, code officers, or local health jurisdictions enforce the EDNA, with Ecology providing oversight and technical support.