Hansen STP
Hansen, ID · Twin Falls County · Publicly Owned Treatment Works
- Average flow
- 0.07 MGD
- Design flow
- 0.13 MGD
- NPDES permit
- ID0022446
- Administratively continued
- Permit expires
- October 2012
- Population served
- 1,346
- CWNS 2022
Hansen STP is a publicly owned wastewater treatment works in Hansen, Twin Falls County, Idaho treating an average of 0.07 million gallons per day against a permitted design capacity of 0.13 MGD, serving about 1,346 residents. Treatment on site includes clarifiers, uncovered lagoons, carrousels / oxidation ditches. It discharges under NPDES permit ID0022446 (administratively continued), which expires in October 2012, with 7 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
- 7
- Effluent violations
- 7
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Hansen STP.
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Nearby wastewater treatment plants in Idaho
Filer · 16 mi away
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Jerome · 18 mi away
3.59 MGD
Buhl · 25 mi away
0.29 MGD
Heyburn · 28 mi away
0.71 MGD
Shoshone · 29 mi away
0.13 MGD
Richfield · 36 mi away
—
Carey · 55 mi away
—
Glenns Ferry · 58 mi away
—
Hansen STP: 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 November 7, 2025.