Colton WWTF
Colton, CA · San Bernardino County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 10.4 MGD
- NPDES permit
- CA0105236
- Administratively continued
- Permit expires
- December 2017
- Population served
- 60,354
- CWNS 2022
Colton WWTF is a publicly owned wastewater treatment works in Colton, San Bernardino County, California, serving about 60,354 residents. Treatment on site includes clarifiers, uncovered lagoons, carrousels / oxidation ditches. It discharges under NPDES permit CA0105236 (administratively continued), which expires in December 2017, with 0 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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Uncovered lagoons
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Carrousels / oxidation ditches
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Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Colton WWTF.
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Nearby wastewater treatment plants in California
Colton · 1 mi away
21.06 MGD
San Bernardino · 3 mi away
—
Riverside · 9 mi away
27.72 MGD
Crestline · 14 mi away
8.3 MGD
Yucaipa · 15 mi away
3.87 MGD
Corona · 18 mi away
8.54 MGD
Corona · 19 mi away
7.64 MGD
Chino · 20 mi away
6.4 MGD
Colton WWTF: 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 September 11, 2026.