Environmental Rules in Moreno Valley, CA (2026)
4 verified environmental rules for Moreno Valley, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Moreno Valley participates in the Santa Ana Regional Water Quality Control Board MS4 permit program. Discharging anything other than clean stormwater into storm drains is illegal. Construction sites over 1 acre require a state SWPPP, and car-washing, pool draining, and painting runoff are restricted.
Stormwater Rules in Moreno Valley
Heavy RestrictionsErosion Control
Construction sites and graded properties in Moreno Valley must implement erosion and sediment controls during wet weather (October through April). Best Management Practices (BMPs) like silt fencing, straw wattles, and stabilized entrances are required by the Santa Ana MS4 permit and Moreno Valley grading ordinance.
Erosion Control in Moreno Valley
Some RestrictionsFlood Zones
Moreno Valley has FEMA flood zones primarily along the San Jacinto River and its tributaries. Properties in Special Flood Hazard Areas require flood insurance. The city participates in NFIP and enforces floodplain development regulations.
Moreno Valley Flood Zone Regulations
Heavy RestrictionsGrading & Drainage
Grading of more than 50 cubic yards or changes to drainage patterns in Moreno Valley require a grading permit from Public Works. Surface drainage cannot be redirected onto neighboring properties. Plans must be stamped by a licensed civil engineer for projects over specified thresholds.
Grading and Drainage in Moreno Valley
Some RestrictionsLooking for Riverside County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Moreno Valley city rules.
Environmental Rules in Riverside County →