8 county-level rules, plus city-specific rules for 3 cities in Allegheny County, Pennsylvania.
Verified from official government sources
Allegheny County has no countywide quiet hours ordinance. Each of the 130 municipalities (Pittsburgh, Mt. Lebanon, Monroeville, etc.) sets its own nighttime noise rules. PA Crimes Code Title 18 §5503 (disorderly conduct) provides a backstop for unreasonable noise as a summary offense with fines up to $300.
No countywide Allegheny County construction-hours rule. Municipalities set their own limits. Pittsburgh allows construction 7 AM to 10 PM weekdays, 8 AM to 10 PM weekends. Most suburban boroughs mirror 7 AM to 8 PM with Sunday restrictions.
Allegheny County enforces the PA Dog Law (3 P.S. §459) countywide but barking-specific rules are municipal. Most Allegheny municipalities classify habitual barking (typically 15-20 continuous minutes) as a public nuisance.
Allegheny County has no countywide leaf-blower ordinance. A few municipalities (notably Mt. Lebanon and Sewickley) restrict gas-powered blower hours; Pittsburgh limits commercial landscaping noise to 7 AM to 9 PM.
Amplified music is regulated municipally, not countywide. Pittsburgh Code §601.04 prohibits amplified sound audible 100 feet from source after 10 PM. ACHD Article XXI sets industrial sound limits (55 dBA night residential).
Pittsburgh International Airport (PIT) sits in Allegheny County and operates Class C airspace. Aircraft noise is federally preempted under 49 U.S.C. §40103 (FAA sole authority). Municipalities cannot regulate flight operations.
ACHD Article XXI Part F sets countywide commercial/industrial noise limits: 65 dBA day / 55 dBA night at receiving residential property lines. This is one of the few truly countywide noise rules in Allegheny County.
Vehicle noise enforced under PA Vehicle Code Title 75 §4523 (muffler required) statewide. No countywide Allegheny ordinance. Loud exhaust, modified mufflers, and engine braking restrictions fall on municipal police and PA State Police.
3 cities in Allegheny County have their own noise ordinances rules. Each link goes to that city's dedicated page with code citations.
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Allegheny County Ordinance Hub →