Simi Valley Stormwater Permit Rules for Developers

Environmental Protection California 3 Minutes Read ยท published February 21, 2026 Flag of California

Simi Valley, California requires developers to follow municipal stormwater controls and state construction stormwater permits to prevent polluted runoff during land disturbance and construction. This guide explains which permits commonly apply, which city department enforces the rules, how enforcement and appeals work, and practical steps to obtain and maintain compliance. Citations point to the City of Simi Valley stormwater program and the California State Water Resources Control Board for statewide construction permit requirements. [1][2]

Overview of Applicable Rules

Developers must comply with the City of Simi Valley's municipal stormwater program and the State's NPDES construction general permit when activities create potential stormwater discharges. Local requirements focus on best management practices (BMPs), erosion control, and approved Stormwater Pollution Prevention Plans (SWPPPs).

Penalties & Enforcement

Enforcement is managed by the City of Simi Valley Public Works/Engineering division working with regional and state water boards. The City page describes the stormwater program and complaint/inspection pathways but does not list fixed fine amounts on that page; fine schedules and specific penalty amounts are not specified on the cited pages. [1][2]

  • Fines: amount not specified on the cited page; refer to enforcement notice or state orders for quantified penalties.
  • Escalation: the City and state may issue warnings, administrative orders, and escalating fines for repeat or continuing violations; exact ranges not specified on the cited page.
  • Non-monetary sanctions: stop-work orders, corrective action orders, SWPPP revisions, equipment seizure, and referral to state enforcement or court action.
  • Enforcer and complaints: City of Simi Valley Public Works - Engineering/Stormwater Program handles local inspections and complaints. Contact via the City stormwater page for reporting and inspection requests. [1]
  • Appeals and review: appeal procedures and time limits are not specified on the cited City stormwater page; appeals may follow standard administrative review processes under municipal code or state procedures. Consult the City for deadlines and filing steps.
If a fine amount is required for planning, request the City enforcement packet for current schedules.

Applications & Forms

Key forms and documents developers typically need:

  • State Construction General Permit (CGP) enrollment including a Notice of Intent (NOI) and a Stormwater Pollution Prevention Plan (SWPPP) for projects over the CGP threshold; see State Water Boards. [2]
  • Local stormwater plan review or erosion control submittal required by City Public Works - check the City stormwater page for local submittal steps. [1]
  • Fees and filing methods: specific fee amounts and payment methods are not specified on the cited City stormwater page; contact City Public Works for fee schedules.

Compliance Inspections and Common Violations

Inspections occur during site grading, after significant rain, and on complaint. Common violations and typical enforcement outcomes:

  • Unprotected soil stockpiles and bare slopes - often trigger correction orders and required BMP installation.
  • Poor sediment controls at site exits - may lead to street sweeping orders and fines.
  • Missing or incomplete SWPPP or BMP maintenance records - corrective actions and follow-up inspections.
Document BMP installation and maintenance daily to speed inspections and appeals.

How-To

  1. Determine whether your project requires coverage under the State Construction General Permit by reviewing the State Water Boards guidance and thresholds. [2]
  2. If required, prepare a SWPPP that identifies BMPs, responsible parties, and inspection schedules.
  3. File the NOI or other permit enrollment with the State and submit any required local stormwater plan or application to City Public Works. [1]
  4. Implement BMPs on-site before ground disturbance and maintain records of inspections and corrective actions.
  5. Respond promptly to City or state inspection notices and correct deficiencies within specified deadlines.
  6. If issued a fine or order, use the City appeal or review procedure noted in the enforcement notice; request documentation and timelines from the City.

FAQ

Do small projects need a stormwater permit?
Many small projects still require site BMPs; State CGP coverage depends on size and soil disturbance thresholds and the City may require local controls.
Who inspects stormwater compliance in Simi Valley?
City of Simi Valley Public Works/Engineering enforces local stormwater rules and coordinates with state water boards for permit compliance. [1][2]
Where do I file a complaint about construction runoff?
Use the City stormwater complaint channel on the Public Works page or contact the State Water Boards for CGP issues. [1][2]

Key Takeaways

  • Enroll in the State CGP when required and prepare a compliant SWPPP.
  • Maintain BMPs and daily inspection records to reduce enforcement risk.
  • Contact City Public Works early for local submittal and inspection guidance.

Help and Support / Resources

  1. [1] City of Simi Valley - Stormwater Program
  2. [2] California State Water Resources Control Board - Stormwater

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