City Of Alturas Wastewater Treatment Plant
Alturas, CA · Modoc County · Publicly Owned Treatment Works
- Average flow
- 0.22 MGD
- Design flow
- 0.5 MGD
- NPDES permit
- CA0078921
- Expired
- Permit expires
- March 2025
- Population served
- 2,560
- CWNS 2022
City Of Alturas Wastewater Treatment Plant is a publicly owned wastewater treatment works in Alturas, Modoc County, California treating an average of 0.22 million gallons per day against a permitted design capacity of 0.5 MGD, serving about 2,560 residents. Treatment on site includes clarifiers. It discharges under NPDES permit CA0078921 (expired), which expires in March 2025, with 72 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
- 72
- Effluent violations
- 72
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at City Of Alturas Wastewater Treatment Plant.
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City Of Alturas Wastewater Treatment 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 August 18, 2026.