Hillsboro, OR Noise Ordinances: Decibel Limits (2026)
Key Facts
- Industrial-to-industrial
- 70 dBA, day and night
- Industrial-to-other zone, night
- 50 dBA, 9 p.m.-6 a.m.
- Industrial-to-other zone, day
- 60 dBA, 6 a.m.-9 p.m.
- Applies in
- I-G, I-P and I-S zones
Summary
Hillsboro's noise code sets separate decibel caps for industrial-zoned property: 70 dBA between industrial neighbors around the clock, but only 50 dBA at night and 60 dBA by day when the sound reaches a non-industrial zone.
sound that exceeds the limits in Table 6.24.030-A:
Table 6.24.030-A, Noise Limits Zone of Noise Producer Zone of Noise Receiver Night (between 9 p.m. and 6 a.m. the following day) Day (between 6 a.m. and 9 p.m.)
Industrial (I-G, I-P and I-S) Industrial (I-G, I-P and I-S) 70 dBA 70 dBA Industrial (I-G, I-P and I-S) All other 50 dBA 60 dBA All Other All other 50 dBA 60 dBA
(Ord. 6464, § 1, 2023)
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Municipal Code: Supplement 1 | Community Development Code: Supplement 1).
Full Breakdown
Table 6.24.030-A in the noise ordinance splits limits by the zone of the noise producer and receiver. Sound crossing from one industrial-zoned property (I-G, I-P or I-S) to another industrial property is capped at 70 dBA at all hours. Sound from an industrial source reaching any other zone drops to 50 dBA overnight (9 p.m.-6 a.m.) and 60 dBA during the day (6 a.m.-9 p.m.), the same limit that applies city-wide outside industrial areas. Measurements are taken at the property line closest to the source with a calibrated meter, and the City Manager can authorize exceptions.
Violations & Fines
Industrial sound exceeding 70 dBA industrial-to-industrial, or 50/60 dBA reaching a non-industrial zone, violates HMC 6.24.030; unauthorized excess noise is a separate offense for each day it continues.
Frequently Asked Questions
Are Hillsboro's industrial noise limits looser than residential limits?
Who enforces industrial noise limits in Hillsboro?
Sources & Official References
Other rules in Hillsboro
Compare Hillsboro to another location·View the Oregon noise ordinances overview
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Decibel Limits in Nearby Cities
How other cities in Washington County handle decibel limits.