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Thurston County, WA Noise Ordinances: Leaf Blower Rules (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Exempt hours
7 a.m.–10 p.m.
Outside those hours
General dBA limits apply
Daytime limit
55 dBA at property line
Nighttime limit
45 dBA at property line
Penalty
Misdemeanor or civil fine

Summary

Thurston County exempts yard maintenance equipment, including leaf blowers, from its noise limits only between 7 a.m. and 10 p.m.; outside that window the county's dBA limits apply.

These county ordinances apply to unincorporated areas of Thurston County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

Sounds created by yard maintenance equipment utilized for yard maintenance purposes between the hours of seven a.m. and ten p.m.;

F. Sounds created by uses or activities for which required federal, state and/or local governmental approval has been obtained;

G. Sounds originating from residential property relating to temporary projects for the maintenance or repair of homes, grounds and appurtenances between the hours of seven a.m. and ten p.m.;

H. Sounds originating from temporary construction sites as a result of construction activities between the hours of seven a.m. and ten p.m.;

I. Sounds created by the use of a generator during power outages;

J. Sounds from customary agricultural activities;

K. Sounds created by the installation or repair of essential utility services;

L. Sounds from the combined activities of starting, servicing, idling, revving or testing motorized vehicles unrelated to use of the vehicle for the purpose of ingress and egress as provided in subsection M of this section. This exemption from the provisions of this chapter only allows these activities for up to five minutes in any four hour period between the hours of seven a.m. and ten p.m. If there is more than one vehicle involved, the five minute limitation applies to all of the vehicles combined; and

M. The operation of motorized vehicles for the purpose of ingress and egress to the property, including idling a vehicle to warm the engine prior to departure from property. This

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 77).

Full Breakdown

Thurston County Code 10.36.040(E) exempts sounds from yard maintenance equipment used for yard maintenance purposes between 7 a.m. and 10 p.m. from the county's public disturbance noise rules. That means gas leaf blowers, mowers and trimmers run freely during those hours. Run one before 7 a.m. or after 10 p.m. and the exemption disappears: the noise must then stay under the general limits of 55 dBA (daytime) and 45 dBA (nighttime) measured at the neighboring property or right-of-way under TCC 10.36.030.

Violations & Fines

A violation of Chapter 10.36 is a misdemeanor under TCC 10.36.050; the county may instead pursue a civil penalty under Chapter 10.38 per RCW 70.107.050.

Frequently Asked Questions

Can I use a leaf blower early in the morning in Thurston County?
Not before 7 a.m. Yard maintenance equipment is only exempt from noise limits between 7 a.m. and 10 p.m. under TCC 10.36.040(E).
What if I run a leaf blower at night?
It loses the yard-equipment exemption and must meet the county's 45 dBA nighttime limit under TCC 10.36.030, or the operator risks a misdemeanor charge.

Sources & Official References

Other rules in Thurston County

All Thurston County rules

How Thurston County compares: Cities with the Strictest Leaf Blower Rules·Compare Thurston County to another location·View the Washington noise ordinances overview

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