Winnebago County, IL Data Centers & Crypto Mining: Data Center Noise Limits (2026)
Key Facts
- Industrial noise
- Exempt once 100+ ft
- Coverage
- Unincorporated county only
- Adopted
- December 11, 2025
- Enforcement
- Winnebago County Sheriff
Summary
Winnebago County's noise ordinance exempts industrial noise, including data center equipment, from its nighttime sound limits once it carries 100 feet or more from the source, and it only applies outside city and village limits.
The following sources of noise are exempt from application of this division: ... (2)Noise generated by agricultural, industrial, construction, repair, or remodeling work where the noise from such can be heard from a distance of 100 feet or more from the source of the noise; and
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 64).
Full Breakdown
The county's noise ordinance (Sec. 50-297 through 50-303, adopted December 2025) declares loud sound a public nuisance and sets quiet hours for sound amplification devices, but Sec. 50-300 carves out noise from agricultural, industrial, construction, repair, or remodeling work whenever it can be heard 100 feet or more from its source. A data center's chillers, generators, and cooling towers fall squarely into that industrial exemption, so the county's noise rule sets no decibel or hourly limit on facility noise. The division also only governs unincorporated Winnebago County: it does not reach a data center sited inside Rockford or another municipality.
Violations & Fines
Exempted industrial noise carries no penalty. Non-exempt noise violations run $100–$500 per 24-hour period, rising to $500–$1,000 for repeat violations of the same section within one year.
Frequently Asked Questions
Does Winnebago County cap data center noise?
Where does the noise ordinance apply?
Sources & Official References
Other rules in Winnebago County
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