Chelan WWTP
20 Chelan Falls Rd, Chelan, WA 98816 · Chelan County · Publicly Owned Treatment Works
- Average flow
- 0.75 MGD
- Design flow
- —
- NPDES permit
- WA0020605
- Administratively continued
- Permit expires
- January 2022
- Population served
- 4,915
- CWNS 2022
Chelan WWTP is a publicly owned wastewater treatment works in Chelan, Chelan County, Washington treating an average of 0.75 million gallons per day, serving about 4,915 residents. It discharges under NPDES permit WA0020605 (administratively continued), which expires in January 2022, with 0 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Chelan WWTP.
Available with a free Klarifi account
See the full treatment train at Chelan WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- 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 Chelan WWTP.
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Nearby wastewater treatment plants in Washington
Entiat · 14 mi away
0.1 MGD
Bridgeport · 20 mi away
0.15 MGD
Brewster · 21 mi away
0.16 MGD
Cashmere · 30 mi away
0.42 MGD
Wenatchee · 30 mi away
2.86 MGD
Rock Island · 31 mi away
0.06 MGD
Peshastin · 34 mi away
0.05 MGD
Leavenworth · 34 mi away
0.02 MGD
Chelan 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 October 26, 2026; facility record last updated May 29, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms