South Bay International WWTP
2415 Dairy Mart Rd, San Diego, CA 92154 · San Diego County · Publicly Owned Treatment Works
- Average flow
- 28.5 MGD
- Design flow
- 18 MGD
- NPDES permit
- CA0109045
- Expired
- 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 28.5 million gallons per day against a permitted design capacity of 18 MGD, serving about 146,085 residents. It discharges under NPDES permit CA0109045 (expired), which expires in June 2026, with 2645 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at South Bay International WWTP.
Available with a free Klarifi account
See the full treatment train at South Bay International WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 2645
- Effluent violations
- 217
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
140.8 MGD
Santee · 24 mi away
—
Cardiff · 35 mi away
1.2 MGD
Escondido · 39 mi away
10.14 MGD
Carlsbad · 42 mi away
23.63 MGD
Oceanside · 47 mi away
10.99 MGD
Fallbrook · 58 mi away
1.37 MGD
Dana Point · 73 mi away
12.64 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 October 26, 2026; facility record last updated April 7, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms