Charles County, MD Noise Ordinances: Vehicle Noise (2026)
Key Facts
- Applies to
- Trucks over 15,000 lbs parked residentially
- Muffler standard
- No muffler presumed a noise nuisance
- Refrigerated trucks
- Must meet § 297-32 industrial noise standard
- On-road vehicles
- Exempt from Chapter 260 under § 260-4A(2)
Summary
Charles County exempts state-licensed motor vehicles on public roads from its general noise ordinance, but its zoning code separately treats a residentially parked truck over 15,000 pounds without a muffler, or one that doesn't meet its manufacturer's exhaust specs, as a presumed nuisance under § 297-212, Use 7.02.410H.
H. Trucks shall not constitute a nuisance due to excessive noise. Trucks without mufflers or trucks that do not meet manufactured recommended exhaust system are presumed to be a nuisance and not in compliance with this subsection. Trucks with refrigeration units will not be permitted unless it can be demonstrated that the noise standards for industrial uses set forth in § 297-32 are met.
Full Breakdown
Two different provisions govern vehicle noise in Charles County. Chapter 260, the general noise ordinance, exempts motor vehicles licensed for use on public roads when operated consistent with the Transportation Article of the Annotated Code of Maryland, so a passing car's exhaust or stereo is not enforced under § 260-3's decibel table. 410, which permits parking a single motor vehicle over 15,000 pounds gross vehicle weight as an accessory to a residential use in the WCD, AC, RC and RR Zones, requires under Subsection H that the truck not constitute a nuisance due to excessive noise.
A truck without a muffler, or one that doesn't meet its manufacturer's recommended exhaust system, is presumed to be a nuisance and out of compliance with that subsection. A truck with a refrigeration unit is treated the same way unless the owner demonstrates it meets the industrial noise standard in § 297-32. 420 for parking more than one such truck. Outside that residential accessory-parking context, a loud commercial truck's exhaust or engine brake is a matter for state vehicle equipment law under the Transportation Article, not the county noise or zoning code.
Violations & Fines
A residentially parked truck over 15,000 pounds without a compliant muffler is presumed noncompliant with Use 7.02.410H and can be denied or lose its accessory-use status; refrigerated trucks must affirmatively demonstrate compliance with the § 297-32 industrial noise standard. Because Chapter 260 exempts licensed vehicles on public roads, on-road muffler or stereo complaints are referred to state Transportation Article enforcement rather than county citation.
Frequently Asked Questions
Does Charles County regulate loud vehicle exhaust?
What about a truck parked at a home without a muffler?
Are refrigerated trucks treated differently under the noise rule?
Sources & Official References
Other rules in Charles County
Compare Charles County to another location·View the Maryland noise ordinances overview
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