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Glenn County, CA Data Centers & Crypto Mining: Data Center Noise Limits (2026)

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

Key Facts

Noise Rule
Adopted; Sec. 15.560.100
Limit At Homes
57 dBA day / 50 night
Industrial Receptor
65 dBA day / 60 night
Metric
One-hour Leq, dBA
Measured At
Beyond the property line

Summary

Unlike many rural counties, Glenn County has an adopted numeric noise standard. Data-center cooling and generators may not exceed 57 dBA in the daytime or 50 dBA at night, measured beyond the property line of any home, school, hospital, library, or nursing home.

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

In the event the receiving property or receptor is a dwelling, hospital, school, library or nursing home, even though it may be otherwise zoned for commercial or industrial and related uses, maximum one-hour equivalent sound pressure received shall be as indicated in Table C.

Source: Glenn County Code, Title 15 (Unified Development Code)View official code

Full Breakdown

Glenn County's noise standard is codified as a performance standard in the Unified Development Code, Section 15.560.100 (Ord. 1183, 2006), not a separate noise ordinance. Table C caps the one-hour equivalent sound level (Leq, A-weighted) received at any dwelling, hospital, school, library, or nursing home at 57 dBA from 7 a.m. to 10 p.m. and 50 dBA from 10 p.m. to 7 a.m., regardless of how that property is zoned. Where the receiving property is industrial, Table B allows 65 dBA daytime and 60 dBA at night. A data center's chillers, cooling fans, and generator testing must meet these limits at the property line, enforced through site plan review and any conditional use permit.

Violations & Fines

Stationary noise exceeding the Table B or Table C limits beyond the property line violates Section 15.560.100. The county can require best-available control technology, deny or condition permits, and pursue code enforcement until the source conforms.

Frequently Asked Questions

Does Glenn County have a decibel limit for data-center noise?
Yes. Section 15.560.100 caps noise received at any home, school, or hospital at 57 dBA (7 a.m.-10 p.m.) and 50 dBA (10 p.m.-7 a.m.), measured beyond the property line, regardless of the receiving property's zoning.
How loud can a data center be next to an industrial neighbor?
Where the receiving property is zoned industrial and is not a dwelling or school, Table B allows up to 65 dBA during the day and 60 dBA at night, measured beyond the property line.

Sources & Official References

Other rules in Glenn County

Noise Ordinances: Construction HoursLight RestrictionsData Center Zoning & SitingSome RestrictionsNoise Ordinances: Leaf Blower RulesLight RestrictionsNoise Ordinances: Barking DogsSome RestrictionsParking Rules: EV ChargingLight RestrictionsParking Rules: Driveway RulesSome RestrictionsFence Regulations: Material RestrictionsLight Restrictions

All Glenn County rules

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