Joint Water Pollution Control Plant
Carson, CA · Los Angeles County · Publicly Owned Treatment Works
- Average flow
- 162.85 MGD
- Design flow
- 400 MGD
- NPDES permit
- CA0053813
- Effective
- Permit expires
- June 2028
- Population served
- 3,353,576
- CWNS 2022
Joint Water Pollution Control Plant is a publicly owned wastewater treatment works in Carson, Los Angeles County, California treating an average of 162.85 million gallons per day against a permitted design capacity of 400 MGD, serving about 3,353,576 residents. It discharges under NPDES permit CA0053813 (effective), which expires in June 2028, with 19 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 19
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
7 verified contacts for Joint Water Pollution Control Plant, with validated emails and direct phone numbers.
Unlock 7 verified contacts (4 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Joint Water Pollution Control Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
San Pedro · 4 mi away
9.8 MGD
Long Beach · 11 mi away
4.44 MGD
Cerritos · 12 mi away
—
Playa Del Rey · 12 mi away
214 MGD
South El Monte · 20 mi away
10.24 MGD
Fountain Valley · 21 mi away
77.37 MGD
Whittier · 22 mi away
28.38 MGD
Los Angeles · 23 mi away
5.9 MGD
Joint Water Pollution Control Plant: 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 April 22, 2025.