Peshastin Wastewater Treatment Plant
Peshastin, WA · Chelan County · Publicly Owned Treatment Works
- Average flow
- 0.05 MGD
- Design flow
- 0.22 MGD
- NPDES permit
- WA0052175
- Administratively continued
- Permit expires
- May 2024
- Population served
- 1,163
- CWNS 2022
Peshastin Wastewater Treatment Plant is a publicly owned wastewater treatment works in Peshastin, Chelan County, Washington treating an average of 0.05 million gallons per day against a permitted design capacity of 0.22 MGD, serving about 1,163 residents. It discharges under NPDES permit WA0052175 (administratively continued), which expires in May 2024, with 5 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Peshastin Wastewater Treatment Plant.
No verified contacts on file yet
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Nearby wastewater treatment plants in Washington
Leavenworth · 3 mi away
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Cashmere · 9 mi away
0.39 MGD
Leavenworth · 17 mi away
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Wenatchee · 17 mi away
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Entiat · 20 mi away
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Rock Island · 26 mi away
0.06 MGD
Cle Elum · 30 mi away
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Chelan · 34 mi away
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Peshastin 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 January 23, 2025.