Environmental Rules in Simi Valley, CA (2026)
4 verified environmental rules for Simi Valley, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Simi Valley bans discharging anything but stormwater into the City's storm drain system, with a narrow list of exempt flows like firefighting water and dechlorinated pool discharge, and backs it with misdemeanor penalties up to $1,000 and six months in jail.
Simi Valley Storm Drain Discharge Ban
Significant RestrictionsSimi Valley Municipal Code §§ 6-12.201, 6-12.801 (Storm Water Quality Management)
No Person will Discharge any substance to the City Storm Drain System except as stated in Part 1-Discharge Prohibitions of the City's Municipal Separate Storm Sewer System, National Pollutant Discharge Elimination System Permit No. CAS004002 and as listed below: (a)Discharges that are in compliance with a Discharge Permit;(b)Discharges that originate from a Federal, State, or other source from ...
Erosion Control
Simi Valley requires a Stormwater Pollution Control Plan for any construction site before a grading, building, or demolition permit issues. Sites of one acre or more must submit a Local SWPPP identifying site-specific erosion and sediment BMPs, signed by the project engineer and the owner.
Simi Valley Construction Erosion Control Rules
Some RestrictionsSimi Valley Municipal Code Sec. 6-12.501 (Stormwater Pollution Control Plans)
(a)General Requirements. Any Responsible Party who: (1) Engages in Construction Activities that requires a grading permit;...must comply with the following:...(C) Provide an approved SWPPP if required by the state; (D) Provide an SWPCP, which must:...(4) Describe the design, placement, and implementation of BMPs which must prevent Non-Stormwater Discharges and reduce Pollutants in Stormwater Di...
Flood Zones
Portions of Simi Valley fall within FEMA-designated flood zones, primarily along the Arroyo Simi and its tributaries. Properties in Special Flood Hazard Areas must meet floodplain development standards and carry flood insurance if federally financed.
Simi Valley FEMA Flood Zone Regulations
Some RestrictionsFEMA Flood Map Service Center
The FEMA Flood Map Service Center (MSC) is the official public source for flood hazard information produced in support of the National Flood Insurance Program (NFIP). Use the MSC to find your official flood map, access a range of other flood hazard products, and take advantage of tools for better understanding flood risk. FEMA flood maps are continually updated through a variety of processes. E...
Flood Elevation Requirements
New homes in Simi Valley's mapped flood hazard zones must have their lowest floor built at least one foot above the base flood elevation shown on FEMA's flood maps, with different formulas for AO zones and unnumbered A zones.
Simi Valley Base Flood Elevation Freeboard Rule
Some RestrictionsSimi Valley Municipal Code §§ 7-5.201, 7-5.603(d)(2) (Flood Damage Prevention)
"Base flood elevation (BFE)" shall mean the elevation shown on the Flood Insurance Rate Map for Zones AE, AH, A1-30, VE and V1-V30 that indicates the water surface elevation resulting from a flood that has a one percent or greater chance of being equaled or exceeded in any given year. ... "Freeboard" shall mean a margin of safety added to the BFE to account for waves, debris, miscalculations, l...
Looking for Ventura County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Simi Valley city rules.
Environmental Rules in Ventura County →