LA County Code Section 12.08.390 establishes tiered exterior noise standards by zone for unincorporated areas. Residential limits are 50 dBA day and 45 dBA night. Commercial zones allow 60/55 dBA and industrial zones allow 70 dBA at all times.
Section 12.08.390 sets exterior noise standards enforced through a multi-tiered system. Noise Zone I (residential/agricultural) limits are 50 dBA daytime and 45 dBA nighttime. Noise Zone II (commercial) limits are 60 dBA daytime and 55 dBA nighttime. Noise Zone III (industrial) permits 70 dBA at all hours. Standard No. 1 prohibits exceeding these levels for more than 30 minutes cumulative per hour. Standard No. 2 adds 5 dB to the base and prohibits exceeding it for more than 15 minutes per hour. Standard No. 3 adds 10 dB for more than 5 minutes per hour. Standard No. 4 adds 15 dB for more than 1 minute per hour. Standard No. 5 adds 20 dB with zero minutes allowed. Interior noise limits are typically 10 dB lower than exterior standards. Emergency vehicles and warning devices are exempt.
Exceeding exterior noise standards is a misdemeanor under Section 12.08.590. Fines up to $1,000 and/or six months imprisonment. Administrative citations may also be issued under Section 12.08.390.
Castaic, CA
Garage conversions to ADUs in unincorporated Castaic are governed by LA County Code Title 22 §22.140.640 and California Government Code §65852.2. No replacem...
Castaic, CA
Castaic is an unincorporated CDP in Los Angeles County governed by LA County Code Title 22 §22.140.640 (Accessory Dwelling Units and Junior Accessory Dwellin...
Los Angeles County, CA
The 2022 LA County Curb Management Strategy prioritizes pickup and dropoff over parking and loading in commercial corridors. DPW retrofits curb zones using a...
Los Angeles County, CA
LA County Code Title 12.84 bans expanded polystyrene takeout containers at unincorporated-area food businesses. California AB-1201 sets ASTM compostability l...
Los Angeles County, CA
LA County Code Title 12.84 (Ord. 2008-0006) bans expanded polystyrene foam cups at all county facilities and food vendors operating on county property. Calif...
Los Angeles County, CA
California AB-1276 prohibits restaurants and food vendors from automatically providing single-use foodware accessories. Utensils, straws, condiments, and sti...
Side-by-side rule comparisons with other cities in Los Angeles County.
See how other cities in Los Angeles County handle decibel limits.
See how Castaic's decibel limits rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.