Riverside City, Water Quality Control
Riverside, CA · Riverside County · Publicly Owned Treatment Works
- Average flow
- 27.72 MGD
- Design flow
- 46 MGD
- NPDES permit
- CA0105350
- Expired
- Permit expires
- October 2018
- Population served
- 366,930
- CWNS 2022
Riverside City, Water Quality Control is a publicly owned wastewater treatment plant in Riverside, Riverside County, California treating an average of 27.72 million gallons per day against a permitted design capacity of 46 MGD, serving about 366,930 residents. Treatment on site includes clarifiers, aerated lagoons, uncovered lagoons, biogas silos, biogas balloons. It discharges under NPDES permit CA0105350 (expired), which expires in October 2018, with 2 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Riverside
Riverside's capital improvement plan lists 21 water, sewer and wastewater line items worth $200M starting 2024–2026. The largest budgeted items are shown here.
All water and sewer capital projects in Riverside →
| Project | Budget | Years |
|---|---|---|
| Main Replacements Program | $61,999,951 | 2024–2029 |
| Transmission Mains | $46,256,992 | 2024–2029 |
| Potable/Irrigation Well Replacements | $14,409,869 | 2024–2029 |
| Distribution System Facilities Replacements | $13,808,669 | 2024–2029 |
| Recycled Water - Jackson Street Phase I Facilities & Site Conversions | $13,000,000 | 2025–2027 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
8 verified contacts for Riverside City, Water Quality Control, with validated emails and direct phone numbers.
Unlock 8 verified contacts (5 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Riverside City, Water Quality Control, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Colton · 8 mi away
21.06 MGD
Corona · 9 mi away
8.54 MGD
Colton · 9 mi away
—
Corona · 10 mi away
7.64 MGD
Chino · 12 mi away
6.4 MGD
San Bernardino · 12 mi away
—
Lake Elsinore · 20 mi away
—
Pomona · 20 mi away
—
Riverside City, Water Quality Control: 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 September 11, 2026; facility record last updated March 27, 2025.