Antioch, CA Environmental Rules: Stormwater Management (2026)
Key Facts
- Governing sections
- AMC §§ 6-9.06, 6-9.08, 6-9.05
- NPDES permit
- City of Antioch Permit No. CA0083313
- Plan trigger
- 10,000+ sq ft new/replaced impervious surface
- Administering official
- City Engineer (Director)
- Penalty class
- Misdemeanor, chargeable as infraction
Summary
Antioch Municipal Code Chapter 9 bans any non-stormwater discharge into the city's storm drain system and requires an approved stormwater control plan for larger development projects under the city's NPDES permit. Violations are misdemeanors that can be charged as infractions at the officer's discretion.
(A) The release of non-stormwater discharges to the city's stormwater system is prohibited. (B) The discharge of stormwater from premises or an activity that causes or contributes to a violation of receiving water limitations in the city's NPDES permit is prohibited.
Full Breakdown
06(A) prohibits the release of any non-stormwater discharge into the city's stormwater system, with narrow exemptions in (C) and (D) for permitted NPDES discharges, natural groundwater flows, and specific approved categories like landscape irrigation runoff and dechlorinated pool water. 08 separately bans unauthorized drainage connections to the storm system and any discharge that creates floating or deposited matter, altered temperature or oxygen levels, visible oil sheen, or conditions harmful to aquatic life or human consumption. 3. 03. The chapter implements the city's own NPDES Permit No.
CA0083313 issued under the state Porter-Cologne Water Quality Control Act and the federal Clean Water Act. 09 layers on ongoing housekeeping duties: property owners must keep sidewalks free of dirt and litter, sweep sidewalk debris into disposal receptacles rather than the gutter, and keep parking lots and paved areas clean enough to avoid discharging pollutants. 15.
Violations & Fines
Violating any provision of Chapter 9 is a misdemeanor under § 6-9.12, though the enforcement officer or City Attorney may instead charge it as an infraction. A misdemeanor conviction carries a fine or imprisonment up to the limits in Cal. Gov't Code § 36901; an infraction conviction carries a fine up to the limit in Cal. Gov't Code § 36900. Each day a violation continues is a separate offense under § 6-9.14, and the city can also pursue civil actions and cost recovery under §§ 6-9.17 and 6-9.18.
Frequently Asked Questions
Can I hose pollutants into an Antioch storm drain?
When does a project need a stormwater control plan in Antioch?
What is the penalty for a stormwater violation in Antioch?
Sources & Official References
Other rules in Antioch
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