Ellensburg WWTP
Ellensburg, WA · Kittitas County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 32 MGD
- NPDES permit
- WA0024341
- Effective
- Permit expires
- December 2023
- Population served
- 20,891
- CWNS 2022
Ellensburg WWTP is a publicly owned wastewater treatment works in Ellensburg, Kittitas County, Washington, serving about 20,891 residents. Treatment on site includes clarifiers, aerated lagoons, uncovered lagoons, biogas silos. It discharges under NPDES permit WA0024341 (effective), which expires in December 2023, with 0 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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Aerated lagoons
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Uncovered lagoons
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Biogas silos
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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
9 verified contacts for Ellensburg WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Ellensburg WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Washington
Kittitas · 5 mi away
—
Naches · 18 mi away
—
Cle Elum · 23 mi away
—
Ellensburg · 26 mi away
0.03 MGD
Yakima · 27 mi away
—
Quincy · 31 mi away
0.03 MGD
Wenatchee · 34 mi away
—
Rock Island · 34 mi away
0.06 MGD
Ellensburg 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 September 11, 2026; facility record last updated August 13, 2026.