South Bay International WWTP
San Diego, CA · San Diego County · Publicly Owned Treatment Works
- Average flow
- 29 MGD
- Design flow
- 25 MGD
- NPDES permit
- CA0108928
- Administratively continued
- Permit expires
- June 2026
- Population served
- 146,085
- CWNS 2022
South Bay International WWTP is a publicly owned wastewater treatment works in San Diego, San Diego County, California treating an average of 29 million gallons per day against a permitted design capacity of 25 MGD, serving about 146,085 residents. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit CA0108928 (administratively continued), which expires in June 2026, with 3159 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
- 3159
- Effluent violations
- 236
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
25 verified contacts for South Bay International WWTP, with validated emails and direct phone numbers.
Unlock 25 verified contacts (22 more than shown)
Names, validated emails and direct phone numbers for decision-makers at South Bay International WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
San Diego · 14 mi away
137 MGD
Santee · 24 mi away
—
Cardiff · 35 mi away
1.06 MGD
Escondido · 39 mi away
7.8 MGD
Carlsbad · 42 mi away
23.78 MGD
Oceanside · 47 mi away
10.7 MGD
Fallbrook · 58 mi away
1.07 MGD
Dana Point · 73 mi away
11.47 MGD
South Bay International WWTP: 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 7, 2025.