Noise from Specific Sources in Montana (2026)
7 rules on the books across Montana, 2 cities and counties. Select a rule to read the full details.
Severity: Few Restrictions · Light Restrictions · Some Restrictions · Significant Restrictions · Heavy Restrictions
HVAC & Mechanical Noise
Noise limits for air conditioners, heat pumps, pool equipment, and other mechanical systems, including decibel thresholds measured at the property line.
Bar & Nightclub Noise
Noise regulations specific to bars, nightclubs, and entertainment venues, including bass frequency limits, soundproofing requirements, and complaint procedures.
Billings
Some RestrictionsBillings enforces numeric decibel limits on commercial noise sources, including bars and nightclubs, under its citywide…
Read full rule →Bozeman
Some RestrictionsIn the City of Bozeman, Montana, a building or place operated in a way that produces repeated disruptive activities…
Read full rule →Generator Noise
Rules for portable and standby generators, including permitted operating hours, decibel limits, and restrictions during non-emergency use.
Billings
Some RestrictionsBillings has no generator exemption in its noise code: portable and standby generators must stay within the same dB(A)…
Read full rule →Bozeman
Some RestrictionsThe City of Bozeman, Montana, does not name generators, but § 16.06.060 bars stationary internal combustion engines…
Read full rule →Delivery Truck Noise
Time-of-day restrictions on commercial delivery trucks operating in residential zones, including back-up beepers, refrigeration units, and engine idling.
Low-Frequency Bass Limits
Special bass-frequency (≤125 Hz) sound limits for venues, including dB(C) measurement standards and how cities differentiate bass noise from baseline ambient.