Stormwater Management: Menifee vs Temecula
How do stormwater management rules compare between Menifee, CA and Temecula, CA?
Menifee and Temecula have similar restriction levels.
Menifee, CA
Riverside County
Menifee discharges urban runoff under Riverside County's NPDES MS4 permit. The city is a co-permittee in the Santa Margarita Region (San Diego RWQCB) for the southern Murrieta Creek/Santa Margarita watershed and the Santa Ana Region (Region 8) for the northern portion of the city. Developers must prepare a Water Quality Management Plan (WQMP) and follow Best Management Practices (BMPs) for construction-phase runoff. Illicit non-stormwater discharges (washwater, paint, oil, pool drainage with chlorine) to storm drains are prohibited.
View full Menifee rules →Temecula, CA
Riverside County
Temecula Municipal Code Chapter 8.28 prohibits non-stormwater discharges into the MS4 storm drain system, which flows untreated into Murrieta Creek and the Santa Margarita River. Property owners must implement BMPs to prevent pollutants from entering storm drains. Construction sites disturbing 1+ acre require a SWPPP and coverage under the State Construction General Permit. Violations carry fines up to $1,000 per day.
View full Temecula rules →Key Facts Comparison
| Fact | Menifee | Temecula |
|---|---|---|
| Regulatory authority | Santa Ana RWQCB (R8) — north Menifee / San Diego RWQCB (R9) — south Menifee | - |
| Riverside County permit | Order R8-2010-0033 (Santa Ana) / R9-2013-0001 (Santa Margarita) | - |
| WQMP trigger | 10,000 sq ft new/redevelopment + priority projects | - |
| Design storm | 85th-percentile 24-hour event (LID retention) | - |
| Construction permit | State Construction General Permit at ≥1 acre disturbance | - |
| - | - |
Highlighted rows indicate differences between cities.
Menifee FAQ
Can I drain my pool to the street?
Only after dechlorination (no detectable chlorine) and pH neutralization (6.5–8.5), and only at a slow trickle that does not cause erosion. Chlorinated discharges are illicit and prohibited under both the Santa Ana and San Diego MS4 permits.
Do I need a SWPPP to build a house?
If your construction site disturbs 1 acre or more (including grading, staging, and stockpiles), yes — file a Notice of Intent on SMARTS and have a QSD prepare a SWPPP. Smaller sites still need a city-reviewed Erosion and Sediment Control Plan.
Does Menifee enforce its own stormwater rules or just the County's?
Menifee is a co-permittee, meaning it is directly responsible for enforcing the MS4 permit within city limits. Inspections, plan checks, and citations are handled by city Engineering / Public Works.
Temecula FAQ
Can I wash my car in the driveway?
Yes, but use biodegradable soap and minimize runoff. Commercial car washes recycle water and are preferred. Charity car washes need a permit and a discharge plan.
What if I see someone dumping into a storm drain?
Report it immediately to Temecula Public Works (951-694-6411) or the 24/7 hotline. Note the location, vehicle, and substance. The City investigates all reports.
Do small home projects need stormwater controls?
Projects under 1 acre don't need a SWPPP, but you must still prevent sediment and debris from entering storm drains using fiber rolls, gravel bags, or covering stockpiles.
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