1 county-level rule, plus city-specific rules for 1 city in Olmsted County, Minnesota.
Verified from official government sources
Olmsted County has not adopted a stand-alone county noise ordinance for unincorporated areas; instead, Minnesota Pollution Control Agency Rule 7030.0040 (state noise standards) and Minn. Stat. 609.72 (disorderly conduct) apply. For residential receivers (Noise Area Classification 1), the nighttime period runs 10:00 p.m. to 7:00 a.m. with limits of L10 = 55 dB(A) and L50 = 50 dB(A); the daytime limits are L10 = 65 dB(A) and L50 = 60 dB(A). The Olmsted County Sheriff's Office (507-328-6800) handles general noise complaints in unincorporated areas. Cities like Rochester apply their own local noise rules.
Minn. R. 7030.0020, 7030.0030, 7030.0040 Subp. 2
"Daytime" means those hours from 7:00 a.m. to 10:00 p.m. "Nighttime" means those hours from 10:00 p.m. to 7:00 a.m. For Noise Area Classification 1 (residential), the daytime L50 standard is 60 dB(A) and L10 is 65 dB(A); nighttime L50 is 50 dB(A) and L10 is 55 dB(A). No person may violate the standards established in part 7030.0040 unless specifically exempted by statute.
1 cities in Olmsted County have their own noise ordinances rules. Each link goes to that city's dedicated page with code citations.
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