Quiet hours in Baltimore, MD — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Baltimore Health Code Title 9 sets a 55 dB(A) residential property-line limit, reduced 10 dB at night (10 p.m.-7 a.m. weekdays; midnight-7 a.m. weekends), with civil penalties up to $1,000 per day under Section 9-217.
Title 9 of the Baltimore City Health Code, originally enacted under Ordinance 19-220, governs noise. Subtitle 2 (Basic Sound Level Standards, Sections 9-201 through 9-218) sets the core decibel limits. Section 9-206 caps sound at 55 dB(A) at any point on a residential property line, 58 dB(A) at a residential-commercial zone boundary, and 61 dB(A) at a residential-manufacturing boundary. Section 9-207 lowers each of those daytime limits by 10 dB(A) during nighttime, defined as 10 p.m. to 7 a.m. on weekdays and midnight to 7 a.m. on weekends and legal holidays. Subtitle 3 separately governs entertainment and commercial amplified noise (Sections 9-301 through 9-317), and Subtitle 4 controls amplified sound in the Market Center district. Article 19, Subtitle 43B (the Neighborhood Nuisance Law) adds escalating civil fines for unruly residential gatherings and lets the city issue 14-day eviction notices to tenants whose conduct repeatedly violates the noise standards. Maryland Code, Environment Article Sections 3-401 through 3-407 authorizes localities to set their own noise standards, and MD Criminal Law Section 6-302 (disorderly conduct) is the state-level fallback.
Section 9-217 makes any violation of Title 9 a civil offense with fines up to $1,000 per day a violation continues. Section 9-218 authorizes injunctive relief and citizen suits. Entertainment and commercial-loudspeaker violations under Subtitle 3 are misdemeanors carrying up to a $1,000 fine and 60 days in jail. Under Article 19, Subtitle 43B, a first unruly-gathering citation is $500 and subsequent offenses within 12 months are $1,000.
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