Do Maryland's state noise limits override city ordinances?

The state sets a baseline that applies statewide, but municipalities may adopt stricter standards. Local rules cannot allow noise above the state ceiling.

How is noise measured under Maryland law?

Sound levels are measured in A-weighted decibels (dBA) at the property line of the receiving property using a calibrated sound level meter.

Are any activities exempt from these limits?

Yes. Emergency operations, certain agricultural activities, motor vehicles on public roads, and lawful construction during daytime hours are exempt.

Maryland Quiet Hours & Noise Law (2026)

Key Facts

Residential nighttime limit: 55 dBA
Residential daytime limit: 65 dBA
Nighttime hours: 10 p.m. to 7 a.m.
Authority: COMAR 26.02.03
Enforcement: MDE and local agencies

Source: Maryland General Assembly

Full Breakdown

Under the Environment Article and COMAR 26.02.03.02, Maryland establishes maximum allowable sound levels measured at the property line of the receiving land use. Residential zones are limited to 65 dBA daytime (7 a.m. to 10 p.m.) and 55 dBA nighttime. Commercial zones allow 67 dBA day and 62 dBA night, while industrial zones allow 75 dBA continuously. The Maryland Department of the Environment enforces these standards alongside local agencies. Local governments may impose stricter limits but cannot exceed the state ceiling for permitted activities. Certain agricultural and emergency activities are exempt.

Violations & Penalties

Civil penalties up to $10,000 per day under Environment Article 1-404. Local citations may add fines. Repeated violations can trigger MDE administrative orders.

Maryland Statewide Environmental Noise Standards

Key Facts

Full Breakdown

Violations & Penalties

Frequently Asked Questions

Sources

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