Yes,
Loud exhaust systems are legal in Mississippi but strictly regulated under state noise ordinances and local municipal codes. The Mississippi Department of Public Safety enforces decibel limits, while cities like Jackson and Gulfport impose additional restrictions. Violations may result in fines or citations, with enforcement tightening in 2026 under updated noise pollution guidelines.
Key Regulations for Loud Exhausts in Mississippi
- State Decibel Limits: Mississippi adheres to a maximum exhaust noise level of 92 decibels (dB) when measured at 50 feet, per Mississippi Code § 63-13-121. Exceeding this threshold constitutes a Class C misdemeanor, punishable by fines up to $500.
- Local Ordinances: Municipalities such as Jackson (Ordinance No. 2023-045) and Biloxi (Chapter 10, Article II) impose stricter limits, often capping noise at 88 dB during daytime hours. Violators face escalating penalties, including mandatory muffler repairs.
- Modified Exhaust Systems: Aftermarket exhausts must comply with federal EPA standards (40 CFR Part 600) and Mississippi’s anti-tampering laws. Vehicles with altered exhausts lacking DOT/EPA certification are subject to roadside inspections and potential impoundment.
Enforcement agencies prioritize complaints from residents, particularly in high-traffic areas like downtown Hattiesburg and the Mississippi Gulf Coast. Owners should verify compliance with both state and local authorities to avoid penalties.