Cumberland County does not set decibel limits. Numeric dB(A) caps exist only in municipal codes within the County (Portland, South Portland, Westbrook, etc.). Statewide there is no general decibel standard — Me. Rev. Stat. tit. 17-A § 501-A uses the qualitative "loud and unreasonable noise" test.
There is no Cumberland County code section setting a dB(A) limit because the County publishes no subject-matter ordinances. Numeric limits operate at the city/town level and vary widely: Portland Code Chapter 17 sets property-line limits by zone and time of day; South Portland and Westbrook use a similar zone/time matrix; smaller towns often use a qualitative "plainly audible at 50 feet" rule. Maine state law does not adopt a statewide dB(A) limit for general noise — Me. Rev. Stat. tit. 17-A § 501-A makes "loud and unreasonable noise" a Class E disorderly-conduct offense if law-enforcement orders cessation and the person refuses, and DEP Chapter 375.10 sets quantitative limits only for sites holding a Site Location of Development permit under tit. 38 § 484.
No county penalty. Municipal violations typically run $100-$500/day under each town's penalty schedule; DEP site-license violations up to $10,000/day under tit. 38 § 349; disorderly conduct under tit. 17-A § 501-A is a Class E crime (up to 6 months / $1,000).
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