Entiat POTW
Entiat, WA · Chelan County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.24 MGD
- NPDES permit
- WA0051276
- Administratively continued
- Permit expires
- July 2022
- Population served
- 1,299
- CWNS 2022
Entiat POTW is a publicly owned wastewater treatment works in Entiat, Chelan County, Washington, serving about 1,299 residents. Treatment on site includes carrousels / oxidation ditches. It discharges under NPDES permit WA0051276 (administratively continued), which expires in July 2022, with 27 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Carrousels / oxidation ditches
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Compliance snapshot (last 3 years)
- Total violations
- 27
- 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 Entiat POTW.
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Nearby wastewater treatment plants in Washington
Chelan · 14 mi away
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Cashmere · 16 mi away
0.39 MGD
Wenatchee · 18 mi away
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Peshastin · 20 mi away
0.05 MGD
Rock Island · 21 mi away
0.06 MGD
Leavenworth · 21 mi away
—
Leavenworth · 25 mi away
—
Quincy · 33 mi away
0.03 MGD
Entiat POTW: 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 29, 2025.