Environmental Rules in Napa, CA (2026)
2 verified environmental rules for Napa, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Napa's Storm Water Quality Control ordinance is Chapter 8.36 of the Municipal Code, adopted in June 2004. It implements the city's NPDES Phase II MS4 permit (State Water Board Order 2013-0001-DWQ, NPDES CAS000004) and prohibits illicit discharges and connections to the storm sewer system that drains to the Napa River.
Napa, CA Stormwater Quality Control Ordinance (Ch. 8.36)
Some RestrictionsFlood Zones
Napa's Floodplain Management Overlay District is Chapter 17.38 of the Municipal Code. The city's Special Flood Hazard Areas were last revised by FEMA's post-bypass Letter of Map Revision (LOMR 16-09-1316P), effective January 22, 2019, reflecting completion of the Napa River-Napa Creek Flood Protection Project.
Napa, CA Floodplain Management Overlay District (Ch. 17.38)
Heavy RestrictionsLooking for Napa County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Napa city rules.
Environmental Rules in Napa County →