Regional Wastewater Facility
18200 Treleven Ave, Lake Elsinore, CA 92530 · Riverside County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 8 MGD
- NPDES permit
- CA8000027
- Expired
- Permit expires
- September 2018
- Population served
- 155,111
- CWNS 2022
Regional Wastewater Facility is a publicly owned wastewater treatment works in Lake Elsinore, Riverside County, California, serving about 155,111 residents. It discharges under NPDES permit CA8000027 (expired), which expires in September 2018, with 4 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Regional Wastewater Facility.
Available with a free Klarifi account
See the full treatment train at Regional Wastewater Facility: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Regional Wastewater Facility.
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Nearby wastewater treatment plants in California
Lake Elsinore · 1 mi away
19.76 MGD
Riverside · 21 mi away
27.97 MGD
Corona · 21 mi away
7.32 MGD
Fallbrook · 22 mi away
1.37 MGD
Corona · 23 mi away
8.49 MGD
Dana Point · 25 mi away
12.64 MGD
Colton · 25 mi away
20.79 MGD
Colton · 26 mi away
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Regional Wastewater Facility: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated May 10, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms