Environmental Rules in Orange, CA (2026)
5 verified environmental rules for Orange, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
The City of Orange is mandated by federal NPDES permit R8-2009-0030 to implement stormwater runoff management programs. All development projects must comply with the city's Local Implementation Plan under the Orange County Drainage Area Management Plan.
Orange Stormwater Management Requirements
Some RestrictionsErosion Control
The City of Orange requires erosion control measures for all grading and construction projects under OMC Title 15 (Building and Construction) and the city's NPDES stormwater permit. A Water Quality Management Plan (WQMP) is required for most development projects.
Orange Erosion Control Requirements
Some RestrictionsCoastal Development
The City of Orange is an inland community located approximately 10 miles from the Pacific coast and is not within the California Coastal Zone. Coastal Commission permits are not required for development in Orange.
Orange Coastal Development Regulations
Few RestrictionsCal. Pub. Res. Code § 30103 (Coastal Act of 1976)
Information on Digital Coastal Zone Boundaries: The original 1977 Coastal Zone Boundary maps were mylar (drafting film) copies of 161 USGS 7.5 minute topographic quadrangles with an inked boundary added. This digital version of the boundary was developed to provide a georeferenced, attributed (to explain the basis of the mapped Coastal Zone), cadastral (parcel-based) depiction of the adopted Co...
Flood Zones
Portions of the City of Orange are within FEMA-designated Special Flood Hazard Areas, particularly along Santiago Creek. Development in flood zones requires compliance with FEMA floodplain management regulations and flood insurance.
Orange FEMA Flood Zone Regulations
Some RestrictionsFEMA Flood Map Service Center, National Flood Insurance Program (NFIP)
FEMA Flood Map Service Center: Welcome! Looking for a Flood Map? Enter an address, a place, or longitude/latitude coordinates: Looking for more than just a current flood map? Visit Search All Products to access the full range of flood risk products for your community. About Flood Map Service Center The FEMA Flood Map Service Center (MSC) is the official public source for flood hazard informatio...
Grading & Drainage
The City of Orange requires grading permits for earthwork and site drainage management under OMC Title 15 and the California Building Code. A Water Quality Management Plan must be submitted before grading permit issuance.
Orange Grading and Drainage Requirements
Some RestrictionsLooking for Orange County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Orange city rules.
Environmental Rules in Orange County →