Delaware County, PA Noise Ordinances: Vehicle Noise (2026)
Key Facts
- Governing law
- 75 Pa.C.S. §4523 (statewide)
- Numeric limits
- 67 Pa. Code §157.11
- Muffler requirement
- Yes, statewide
- Enforcement
- Local + PA State Police
- County-specific rule
- None; state preempts
Summary
Vehicle noise is set by Pennsylvania statute, not Delaware County. 75 Pa.C.S. § 4523 requires every vehicle on a highway to stay within the sound level the state prescribes; loud exhaust and muffler defects are enforced statewide.
Every motor vehicle operated on a highway shall be constructed, equipped, maintained and operated so as not to exceed the sound level for the vehicle as prescribed in regulations promulgated by the department.
Full Breakdown
Because motor-vehicle noise is a Vehicle Code matter, the same rule applies everywhere in Delco. 75 Pa.C.S. Section 4523(a) requires every motor vehicle operated on a highway to be constructed, equipped, maintained, and operated so as not to exceed the state's prescribed sound level. PennDOT's regulation, 67 Pa. Code Section 157.11, sets the numeric limits (for example, 76-84 dBA for ordinary cars depending on speed and site). Middletown's local horn rule (Section 155-2.C) additionally bars unnecessary, harsh horn use. Municipal police and the Pennsylvania State Police enforce both the statute and any local horn or vehicle-noise provisions.
Violations & Fines
Violations of § 4523 and PennDOT sound-level rules are summary traffic offenses (fine plus costs and possible equipment-repair order). Local horn misuse can add a municipal fine.
Frequently Asked Questions
Are loud exhausts illegal in Delaware County?
Does Delco have its own vehicle-noise law?
Sources & Official References
Other rules in Delaware County
Compare Delaware County to another location·View the Pennsylvania noise ordinances overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.