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.
Chapter 8.36 documents Napa's authority under Section 402(p)(3) of the federal Clean Water Act and California's Porter-Cologne Water Quality Control Act (Water Code 13000 et seq.). The City of Napa is a small MS4 under the State Water Resources Control Board's General Permit (Order 2013-0001-DWQ, NPDES CAS000004). Section 8.36.050 prohibits illicit discharges (any non-stormwater discharge to the MS4 that violates an NPDES permit or threatens water quality standards) and Section 8.36.060 prohibits illicit connections. The city joined the Cities of American Canyon, St. Helena, Town of Yountville, Town of Calistoga, and County of Napa in a Napa Countywide Stormwater Pollution Prevention Program to coordinate Phase II compliance across the Napa River watershed. Construction sites disturbing one acre or more also need coverage under the statewide Construction General Permit (Order 2022-0057-DWQ).
Discharging wash water, paint, oil, sediment, pool water, or any non-stormwater pollutant into a Napa storm drain or gutter violates Sections 8.36.050 and 8.36.060. The Enforcement Official can require a Stormwater Pollution Prevention Plan, issue notices of violation, and refer matters to the Regional Water Board for civil penalties under Water Code 13385.
Napa, CA
Pool barriers in Napa follow California Health and Safety Code Sections 115921-115929 (the Swimming Pool Safety Act, as amended Jan 1, 2018) and California B...
Napa, CA
Napa Municipal Code 17.52.170 governs fence height and visibility but does not impose a closed list of allowed residential fence materials. Wood, vinyl, orna...
Napa, CA
Napa's Municipal Code does not require neighbor consent to build a fence. Boundary fence cost-sharing follows California Civil Code Section 841 — the Good Ne...
Napa, CA
Fences 6 feet or less in Napa generally do not need a building permit, but any fence over 6 feet in height must obtain a building permit under the California...
Napa, CA
City of Napa Municipal Code Section 17.52.170 regulates fences, walls, and hedges. Fences in residential side and rear yards are typically allowed up to 6 fe...
Napa, CA
The City of Napa caps household keeping at six (6) small domestic animals over four months of age under the Zoning Ordinance definition in Napa Municipal Cod...
See how Napa'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.