Mesa, AZ Data Centers & Crypto Mining: Data Center Noise Limits (2026)
Key Facts
- Governing standard
- No exceedance of baseline ambient noise
- Measured at
- Nearest residential/sensitive-use property line
- Post-CO sound study deadline
- Within 30 days
- Follow-up study duration
- Annual for 5 years
- Standard waivable by variance/SUP?
- No: expressly barred
Summary
Mesa data centers permitted as a principal use must be engineered so their operating noise never exceeds the pre-construction ambient sound levels at the nearest residential property line, verified by a mandatory certificate-of-occupancy sound study and five straight years of annual follow-up studies.
Based on the results of the initial sound study, the Data Center shall be designed and built to incorporate sound mitigation methods sufficient to prevent the sound levels emanating from the Data Center (as determined by a third-party acoustical consultant) from exceeding the ambient noise levels at the property line of the nearest Residential Zoning District, residential use, or other sensitive use as determined by the Planning Director that were observed in the baseline study. ... Within 30 days of the issuance of a certificate of occupancy or certificate of completion, whichever occurs first, the Data Center operator shall conduct a sound study performed by a third-party acoustical consultant. ... The Data Center operator shall perform an annual sound study during peak routine operation of the Data Center mechanical equipment for five (5) years after completion of the initial post-construction sound study.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 22).
Full Breakdown
that were observed in the baseline study' (§ 11-31-36(F)(4)(c)). That baseline comes from an initial sound study performed before construction by a third-party acoustical consultant, documenting both on-site sound levels and levels at the nearest residential or sensitive-use property line. Section 11-31-36(G), Operational Requirements, then locks the standard in post-construction: within 30 days of the certificate of occupancy or certificate of completion, the operator must commission a sound study during peak routine mechanical-equipment operation, and must repeat that study annually for five years after the initial post-construction study, submitting results to the City within 30 days of each certificate-of-occupancy anniversary.
Section 11-31-36(G)(1) bars any modification or deviation from these operational standards through a PAD Overlay, Bonus Intensity Zone Overlay, Alternative Compliance, Special Use Permit, or variance, the noise-monitoring regime cannot be waived by any zoning tool. m. Monday through Friday except during an actual power outage or utility demand-response event.
Violations & Fines
The ordinance ties compliance to the sound-study cycle rather than a fixed dBA table: an operator whose certificate-of-occupancy or annual study shows noise exceeding the baseline levels documented in the initial sound study must submit a mitigation plan with that study and implement the identified measures within 60 days, with proof of implementation provided to the City.
Frequently Asked Questions
Does Mesa set a fixed decibel limit for data centers?
How often must a Mesa data center test its noise levels?
Can a data center get a variance from Mesa's noise-monitoring rule?
What happens if a Mesa data center's noise exceeds its baseline?
Sources & Official References
Other rules in Mesa
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Data Center Noise Limits in Nearby Cities
How other cities in Maricopa County handle data center noise limits.