Orange, CA Environmental Rules: Erosion Control (2026)
Key Facts
- Governing chapter
- OMC Ch. 7.01, Water Quality and Stormwater Discharges
- Enforcing office
- Public Works Director / stormwater inspector
- Permit review trigger
- Grading, building or plumbing permit issuance
- Compliance deadline
- 90 days, extendable 90 more for good cause
- Appeal window
- 10 days to request hearing before City Clerk
- Related subdivision duty
- OMC § 16.04.020 requires erosion control on all subdivisions
Summary
Orange requires grading and building permit applicants to control erosion and sediment before the City signs off. The Public Works Director reviews plans and imposes stormwater conditions, and every property owner must follow best management practices to keep pollutants and sediment out of the storm drain system during construction.
A. New Development and Significant Redevelopment. 1. All new development and significant redevelopment shall be undertaken to ensure that pollutant discharges from development are reduced to the maximum extent practicable... 2. Prior to the issuance by the City of a grading permit, building permit or nonresidential plumbing permit for any new development or significant redevelopment, the Public Works Director shall review the project plans and impose terms, conditions and requirements on the project in accordance with subsection (A)(1) of this section... Every person owning property or conducting any activity, operation or facility shall comply with applicable BMP as identified in the DAMP and LIP in order to prevent, to the maximum extent practicable, pollutants from entering the stormwater drainage system and maintain the BMPs as specified in the project approved WQMP of Section 7.01.060.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4796775; v10 updated 2026-01-27).
Full Breakdown
01 of the Orange Municipal Code makes the City a co-permittee under the Santa Ana Regional Water Quality Control Board's NPDES permit and requires every new development or significant redevelopment project to reduce pollutant discharges, including sediment, to the maximum extent practicable. 050 and imposes terms, conditions and requirements tied to the Drainage Area Management Plan (DAMP) and Local Implementation Plan (LIP). 060 with low-impact-development, source-control and treatment-control best management practices sized to the NPDES permit's volume or flow design criteria. 070 then imposes an ongoing duty: every person owning property or conducting an activity on it must comply with the applicable BMPs identified in the DAMP and LIP and maintain them as specified in the project's approved WQMP.
020 requires every subdivision to provide for proper grading and erosion control, including preventing sedimentation or damage to off-site property, as a condition of subdivision approval under Title 16. 040, which the grading permit applicant must follow for cut, fill and earthwork construction.
Violations & Fines
Inspectors under Section 7.01.080 may enter a site during business hours on 24 hours' notice, or immediately for illicit discharges, to check BMP compliance, take samples and review stormwater pollution prevention records. A violation triggers a written notice of noncompliance under Section 7.01.090 that sets a compliance date, capped at 90 days unless the inspector grants a 90-day extension for good cause; the notice can order the owner to immediately contain runoff, stop the violation and clean up the affected area. If the violation is not corrected in time, the City may invoice the owner for re-inspection costs, and the City Attorney may pursue collection. A recipient may appeal a notice of noncompliance or cost invoice to the City Clerk within 10 days and get an administrative hearing within 30 business days.
Frequently Asked Questions
Does Orange require an erosion control plan before grading starts?
What happens if a construction site in Orange lets sediment run off?
Can a property owner appeal a stormwater violation notice in Orange?
Do all Orange subdivisions need erosion control?
Sources & Official References
Other rules in Orange
California rules heatmap·Compare Orange to another location·View the California environmental rules overview
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Erosion Control in Nearby Cities
How other cities in Orange County handle erosion control.