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Noise Control

This page provides examples of local noise control policies in Washington State, as well as relevant statutes and court decisions.

It is part of MRSC's series on Nuisances.

Overview

Inadequately controlled noise can adversely affects people's health, safety, welfare, property values, and the environment. Common examples of noise nuisances include amplified noise (loud music), industrial noises (such as construction or mechanical equipment), automotive noises (such as loud mufflers or compression brakes), human noises (such as loud parties or arguments) and animal noises (such as livestock, crowing roosters, or barking dogs).

Cities and counties in Washington follow three basic approaches to control noise problems:

  1. Adoption of noise control provisions based upon the state Noise Control Act, chapter 70A.20 RCW (formerly chapter 70.107), utilizing decibel-based standards;
  2. Adoption of subjective "public disturbance noise" standards, which do not require the use of decibel meters for enforcement; or
  3. A combination of these two approaches.

Many smaller cities and towns have chosen the "public disturbance noise" approach. Larger communities are more likely to use provisions authorized by the Noise Control Act. Although special purpose districts do not typically regulate noise, depending on the type of district, their operations may be required to comply with noise standards.

Noise Control Laws

RCW 70A.20.030(1) empowers the Washington State Department of Ecology (DOE) to establish maximum noise levels in identified areas or environments. The rules adopted by the DOE establishing maximum permissible noise levels are contained in chapter 173-60 WAC, relating to maximum environmental noise levels, and chapter 173-62 WAC, relating to motor vehicle noise performance standards.

  • Chapter 173-60 WAC establishes three classes of environmental designations for noise abatement (EDNA), which are the areas or zones within which the maximum permissible noise levels are set. These EDNA zones are defined with respect to types of land use such as residential, commercial/retail, and industrial properties. EDNA zone designations can be applied to previously established classifications in existing zoning ordinances or comprehensive plans.
  • Chapter 173-62 WAC relates to motor vehicle noise performance standards and establishes maximum permissible sound levels for motor vehicles on all public highways. This chapter recognizes that local needs may differ, and these rules do not require enforcement agencies or local governments to adopt or use every standard provided to determine a violation.

Court Decisions

  • State v. Immelt (2011) — The court found a free speech violation in a Snohomish County ordinance prohibiting sounding a car horn except for public safety reasons.
  • Holland v. City of Tacoma (1998) — The court held constitutional Tacoma's noise ordinance prohibiting the playing of car sound systems at a volume that would be "audible" at a distance of greater than 50 feet.
  • Seattle v. Eze (1988) — The court upheld a Seattle ordinance prohibiting "unreasonably" disturbing others with "loud or raucous behavior" while on public buses. The ordinance met constitutional requirements of sufficient certainty to provide adequate notice and to avoid arbitrary enforcement.
  • Spokane v. Fischer (1988) — The court found unconstitutionally vague a Spokane ordinance prohibiting frequent and habitual dog barking that disturbs or annoys “any other person or neighborhood.”
  • Everett v. O'Brien (1982) — The court upheld Everett's public nuisance noise ordinance in response to a claim that decibel measurements are required in order to establish a violation. The court affirmed that violations could be established under a public nuisance approach without requiring decibel measurements.  

Regulating Noise Nuisances

Local government across Washington have varied approaches to regulating noise nuisances, from using a decibel-based approach to regulate a variety of noises, to identifying and regulating specific noises.

The Decibel-Based Approach

From a practical standpoint, the decibel-based standards approach is the most difficult to enforce. This method requires the adoption and/or enforcement of noise control provisions enacted pursuant to RCW 70A.20.030(1).

Local governments may enact similar provisions establishing noise limitations for areas within their jurisdictions. RCW 70A.20.060(3) requires that any difference between the local regulations and those provided for by the state must be approved by the DOE. If the DOE has not acted within 90 days after a local ordinance has been submitted, the local provision is automatically approved.

Quite a few Washington cities and counties have adopted combined public nuisance and decibel-based ordinances. Some pair the EDNA set forth in chapter 173-60 WAC with zoning codes to establish maximum permissible environmental noise levels for specifically designated or zoned areas. 

Examples of Decibel-Based Code Provisions

All of the examples below set maximum permissible decibel levels within their jurisdiction, often making distinctions between differently zoned areas, and also allow for exemptions, such as noise produced by emergency vehicles, electrical substations, or utility installations. Many also offer the opportunity to obtain variances when producing prohibited noise in temporary ways, such as during construction projects. 

  • Bellevue Municipal Code Ch. 9.18 — Noise Control. Establishes quiet zones in a specific community park and a greenbelt access area and includes additional noises prohibited in these areas.
  • Kent Municipal Code Sec. 8.05.070  — Noise Control. Sets forth which EDNA designation applies in each of the city’s zones. 
  • Seattle Municipal Code Ch. 25.08 — Noise Control. Requires applicants submit a Noise Management and Mitigation Plan when submitting for a variance.
  • Thurston County
    • Municipal Code Ch. 10.36 — Public Disturbance Noise. On the list of exempted items is noise generated through customary agricultural activities and from off-highway vehicles operating in off-road vehicle parks.
    • Municipal Code Ch. 10.38 —Civil Penalties for Noise Violations
  • Tukwila Municipal Code Ch. 8.22 — Noise. Exempts, among other things, aircraft noise, including noise generated when engines are being tested and/or maintained.

The Public Disturbance Approach

Another approach to the problem of noise control is through the enforcement of "public disturbance" noise ordinances. Public disturbance noise ordinances are based upon a subjective standard, as opposed to objective measures of maximum decibel readings.

Public disturbance noise provisions, while perhaps easier to enforce, may raise constitutional questions. Provisions must be sufficiently detailed to place a person on notice of what constitutes a violation, but prohibitions cannot be so broad as to impinge on free speech (i.e., First Amendment).

Examples of Public Nuisance/Disturbance Noise Ordinances and Code Provisions

  • Chelan Municipal Code Ch. 8.31 — Public Disturbance Noise. Defined as a loud, raucous, frequent, repetitive, or continuous noise and includes, but is not limited to, construction activity at non-approved times, audio equipment, including portable or vehicle audio, and vehicle horns or sirens clearly heard by someone at a distance of 75 feet or more.
  • Kirkland Ordinance No. O-4804 (2022) — Prohibits busking in public areas without a permit; no busker may generate noise that can be heard 50 or more feet from the source; provides other limitations and regulations.
  • Lakewood Municipal Code Sec. 8.36.10 — Noise Control. Provides that yelling, shouting, whistling, or singing on a public street in a manner that disturbs the peace is a violation; restricts the hours that noise from construction and/or lawn/ground maintenance is allowed.
  • Oak Harbor Municipal Code Ch. 6.56 — Public Nuisance Noises. Includes among possible public disturbances, the keeping of any animal and/or bird making frequent or long, continued noise.
  • Omak Municipal Code Ch. 7.20 — Public Disturbance Noises. Includes among possible public disturbances: yelling, shouting, hooting, whistling, or singing on or near public streets at any time or place. 

Examples of Audio Device Code Provisions

These are generally sections within codes that address broader issues, such as noise control or vehicle parking. 

  • Bellevue Municipal Code Sec. 9.18.042 — Noise Control – Noise prohibited in quiet zones. Creates quiet zones in which noises are prohibited if they can be heard from over 30 feet from the source.
  • Bellingham Municipal Code Sec. 10.24.120(C) — Offenses Against Public Order - Public disturbance noise. Declares as a public disturbance sound from portable audio equipment operated at a volume that is audible greater than 50 feet from the source.
  • Port Townsend Municipal Code Sec. 9.26.010 — Noise Control – Portable/motor vehicle audio equipment. Restricts sound from portable and vehicle stereo equipment such that it not be audible more than 75 feet from the source

Regulation of Construction Noises

Some jurisdictions regulate construction site noise by establishing designated hours for permitted construction for certain zones, such as residential zones. Others regulate construction noise through a provision in their general noise control ordinances.

Examples of Construction Noise Code Provisions

  • Issaquah Municipal Code Ch. 16.35 — Construction Hours. Permits construction noise from 7:00 a.m. to 6:00 p.m. during the weekdays.  Allows individuals or entities to apply for extended hours via a permit process.
  • Poulsbo Municipal Code Ch. 15.32 — Regulation of Construction Hours. Prohibits construction activity within 1,000 feet of any residence between 7:00 p.m. and 7:00 a.m. on weekdays and on federal, state, or city-observed holidays; weekend prohibited hours are 7:00 p.m. to 8:00 a.m.
  • Tumwater Municipal Code Sec. 8.08.030(G) — Noise Control - Noise disturbance described. Limits construction activity that is audible from a dwelling to certain hours.  

Regulation of Mechanical Equipment

Noise from mechanical equipment, such as heat pumps, is often the subject of code enforcement complaints. Noise-generating mechanical equipment is generally required to meet the noise limits set by the DOE in chapter 173-60 WAC, as well as in local ordinances. Mechanical equipment is also regulated by building and zoning codes. Some jurisdictions provide that mechanical equipment may be located in a setback if the applicable EDNA noise levels are met at the property line.

Examples of Mechanical Equipment Noise Ordinances

Regulation of Power Equipment 

While power tools are often viewed as labor-saving devices, they can also be quite noisy. Many local governments have regulated the times during which these tools may be used.

Examples of Power Equipment Noise Code Provisions

  • Kirkland Zoning Code Sec. 115.95(2) — Noise Regulations. Prohibited before 8:00 a.m. or after 8:00 p.m. weekdays and before 9:00 a.m. or after 6:00 p.m. on weekends or on specific federal holidays.
  • Shoreline Municipal Code Sec. 9.05.040(A) — Noise Control - Maximum permissible environmental noise levels. Sets maximum permissible environmental noise levels using dBa to restrict noises between 10:00 p.m. and 7:00 a.m. on weekdays and 10:00 p.m. and 9:00 a.m. on weekends.
  • Tumwater Municipal Code Sec. 8.08.040 — Noise Control - Public disturbance noise. Uses EDNA categories to restrict certain noises at certain locations during times of the day/week.

Regulation of Rock Crushing and Gravel Operations

Generally, noises from manufacturing and extraction are regulated through performance measures.

Examples of Rock Crushing and Gravel Operation Noise Code Provisions

  • Jefferson County Code Sec. 18.20.240(2)(f) — Performance and Use-Specific Standards – Mineral extraction, mining, quarrying and reclamation. Allows these activities only between 7:00 a.m. and 7:00 p.m. on weekdays.
  • Thurston County Code Sec. 17.20.110 — Mineral Extraction and Asphalt Production – Noise. Requires compliance with DOE regulations regarding noise.

Recommended Resources

Related MRSC resources include:


Last Modified: February 05, 2026