Temecula, CA Environmental Rules: Erosion Control (2026)
Key Facts
- Enforcing agency
- City of Temecula city engineer
- SWPPP trigger
- 1 acre or more disturbed soil, §18.18.020(B)(1)
- Pre-rain deadline
- Controls installed 7 days before forecast rain
- Responsibility ends
- At certificate of occupancy, §18.18.040(C)
- Permit revocation
- Allowed for emergency erosion issues, §18.18.080(D)
- Max penalty
- $1,000 fine and/or 6 months jail, per day
- Appeal window
- 3 calendar days to city council, §18.27.100
Summary
Every construction and grading project in Temecula must control its runoff under Chapter 18.18 of the Municipal Code. Section 18.18.020 requires pollutants to stay on site and be reduced to the maximum extent practicable, and any project disturbing an acre or more of soil must also carry state construction general permit coverage and a stormwater pollution prevention plan.
All individual construction and grading projects shall implement measures to ensure that pollutants: (1) are not discharged from the site; (2) shall be reduced to the maximum extent practicable (MEP); and (3) will not cause or contribute to an exceedance of water quality objectives in the local natural watercourses. ... Develop and implement an erosion and sediment control plan to manage stormwater and nonstormwater discharges from the site at all times in accordance with the Engineering and Construction Manual. Projects disturbing, exposing or stockpiling one acre or more of soil are also required to have coverage under the state construction general permit and generate a stormwater pollution prevention plan (SWPPP).
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4862229; v11 updated 2026-04-14).
Full Breakdown
Section 18.18.020(A) states that "all individual construction and grading projects shall implement measures to ensure that pollutants... are not discharged from the site... shall be reduced to the maximum extent practicable (MEP); and... will not cause or contribute to an exceedance of water quality objectives in the local natural watercourses." Subsection (B)(1) requires every permittee to develop and implement an erosion and sediment control plan, and specifically requires that "projects disturbing, exposing or stockpiling one acre or more of soil are also required to have coverage under the state construction general permit and generate a stormwater pollution prevention plan (SWPPP)."
The chapter goes further than the one-acre state threshold in several places. Section 18.18.040(C) makes the permittee responsible for erosion and sediment control on all disturbed areas "until issuance of certificate of occupancy," after which the project's water quality management plan BMPs take over. Section 18.18.080(E) requires protective devices to be in place "within seven days prior to any forecast rain," and lets the city engineer send in city crews or contractors to fix inadequate controls and bill the cost against the project's cash deposit. Section 18.18.060 requires a city-approved erosion and sediment control plan on file at the worksite before any grading can proceed, updated as conditions change through construction.
Violations & Fines
Grading or building without an approved erosion and sediment control plan violates Chapter 18.18, and Section 18.27.040 treats any Title 18 violation as a misdemeanor, carrying up to a $1,000 fine, six months in county jail, or both, charged separately for each day the violation continues. Under Section 18.18.080(D), the city engineer can revoke the grading permit outright for a site that needs emergency erosion control work, and the permit stays revoked until an approved control system is installed and all fees are paid. Decisions may be appealed to city council within three calendar days under Section 18.27.100.
Frequently Asked Questions
At what point does a Temecula project need a SWPPP?
How soon before rain do I need my erosion controls installed?
Can Temecula revoke my grading permit over erosion problems?
Who is responsible for erosion control until my project is finished?
Sources & Official References
Other rules in Temecula
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