Elk River STP
Elk River, ID · Clearwater County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.08 MGD
- NPDES permit
- ID0020362
- Administratively continued
- Permit expires
- August 2023
- Population served
- 136
- CWNS 2022
Elk River STP is a publicly owned wastewater treatment works in Elk River, Clearwater County, Idaho, serving about 136 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit ID0020362 (administratively continued), which expires in August 2023, with 1 recorded violation in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Elk River STP.
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Nearby wastewater treatment plants in Idaho
Deary · 12 mi away
—
Deary · 19 mi away
—
Orofino · 21 mi away
0.02 MGD
Orofino · 21 mi away
—
Fernwood · 26 mi away
—
Kendrick · 26 mi away
0.01 MGD
Pierce · 27 mi away
0.05 MGD
Troy · 28 mi away
0.04 MGD
Elk River 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 6, 2025.