Maricopa County, AZ Noise Ordinances: Decibel Limits (2026)
Key Facts
- Zoning district
- IND-2 General Industrial (unincorporated county)
- Standard
- No objectionable noise, vibration, smoke, or fumes
- Criminal penalty
- Class 2 misdemeanor, separate offense per day
- Civil penalty authority
- A.R.S. Section 11-815(D), same statutory maximum
- Scope
- Unincorporated Maricopa County only
Summary
Unincorporated Maricopa County's IND-2 general industrial zoning district only permits manufacturing and processing uses that don't produce objectionable noise, vibration, smoke, or fumes harming neighboring properties: the county's baseline standard for industrial and commercial noise.
IND-2 (General Industrial Zoning District)... Principal uses permitted in this zoning district include the manufacture, compounding, processing, packaging or treatment of materials which do not cause or produce objectionable effects that would impose hazard to adjacent or other properties by reason of smoke, soot, dust, radiation, odor, noise, vibration, heat, glare, toxic fumes, or other conditions that would affect adversely the public health, safety and general welfare.
Full Breakdown
The Maricopa County Zoning Ordinance conditions every use permitted in the IND-2 General Industrial district on not causing objectionable noise, vibration, smoke, soot, dust, radiation, odor, heat, glare, or toxic fumes that would harm adjacent properties or the public health and safety. A use that crosses that line is out of compliance with its zoning approval. Under MCZO Section 1202.3, any zoning violation is a public nuisance; Section 1203.1 makes it a class 2 misdemeanor with each day of continued violation a separate offense, and Section 1203.2 allows civil penalties up to the same statutory maximum under A.R.S. Section 11-815(D). This applies only in unincorporated areas. Phoenix, Mesa, and other cities set their own industrial noise rules.
Violations & Fines
A confirmed IND-2 nuisance violation is a class 2 misdemeanor, each day counted separately, plus civil penalties up to the same statutory maximum under A.R.S. Section 11-815(D).
Frequently Asked Questions
Does Maricopa County set a decibel limit for factories?
Does this rule apply inside Phoenix or Mesa?
Sources & Official References
Other rules in Maricopa County
Compare Maricopa County to another location·View the Arizona noise ordinances overview
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