Dunsmuir WWTP
Dunsmuir, CA · Siskiyou County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.3 MGD
- NPDES permit
- CA0078441
- Effective
- Permit expires
- March 2029
- Population served
- 1,547
- CWNS 2022
Dunsmuir WWTP is a publicly owned wastewater treatment works in Dunsmuir, Siskiyou County, California, serving about 1,547 residents. Treatment on site includes clarifiers, uncovered lagoons, carrousels / oxidation ditches. It discharges under NPDES permit CA0078441 (effective), which expires in March 2029, with 335 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
- 335
- Effluent violations
- 10
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Dunsmuir WWTP.
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Anderson · 50 mi away
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Cottonwood · 55 mi away
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Mineral · 67 mi away
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Red Bluff · 71 mi away
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Dunsmuir 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 February 2, 2025.