Unincorporated LA County falls under the LA County MS4 NPDES permit. The LACFCD operates one of the largest flood protection systems in the world, including 14 dams and 80,000+ catch basins. Low Impact Development standards apply to new construction. The district captures and infiltrates 270,000+ acre-feet annually.
Unincorporated LA County falls under the LA County Municipal Separate Storm Sewer System (MS4) NPDES Permit, one of the most comprehensive stormwater permits in the nation. The LA County Flood Control District (LACFCD) manages stormwater infrastructure. All new development and significant redevelopment must comply with Low Impact Development (LID) standards requiring on-site stormwater retention or treatment. Commercial and industrial facilities must implement a Stormwater Pollution Prevention Plan. Illicit discharge of anything other than stormwater into the storm drain system is prohibited under Title 12.
Illicit discharge to storm drains carries administrative fines of $1,000-$25,000 per day under Title 12. The Regional Water Quality Control Board can impose additional penalties up to $10,000 per day. Failure to implement required LID standards may result in withholding of building permits and certificates of occupancy. Report illegal dumping to the county hotline at (888) 846-0800.
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 stormwater management.
See how Castaic's stormwater management rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.