Holtville City WWTP
Holtville, CA · Imperial County · Publicly Owned Treatment Works
- Average flow
- 0.36 MGD
- Design flow
- 0.85 MGD
- NPDES permit
- CA0104361
- Effective
- Permit expires
- February 2027
- Population served
- 4,991
- CWNS 2022
Holtville City WWTP is a publicly owned wastewater treatment works in Holtville, Imperial County, California treating an average of 0.36 million gallons per day against a permitted design capacity of 0.85 MGD, serving about 4,991 residents. Treatment on site includes clarifiers. It discharges under NPDES permit CA0104361 (effective), which expires in February 2027, with 6 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 6
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Holtville City WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Holtville City WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Imperial · 8 mi away
1.4 MGD
Heber · 8 mi away
0.48 MGD
El Centro · 9 mi away
3.7 MGD
Calexico · 12 mi away
2.5 MGD
Brawley · 14 mi away
—
Seeley · 15 mi away
0.1 MGD
Westmorland · 19 mi away
0.2 MGD
Calipatria · 23 mi away
0.7 MGD
Holtville City 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 August 10, 2026.