Ellensburg WWTP
2415 Canyon Rd, Ellensburg, WA 98926 · Kittitas County · Publicly Owned Treatment Works
- Average flow
- 3.59 MGD
- Design flow
- 32 MGD
- NPDES permit
- WA0024341
- Administratively continued
- Permit expires
- December 2023
- Population served
- 20,891
- CWNS 2022
Ellensburg WWTP is a publicly owned wastewater treatment works in Ellensburg, Kittitas County, Washington treating an average of 3.59 million gallons per day against a permitted design capacity of 32 MGD, serving about 20,891 residents. It discharges under NPDES permit WA0024341 (administratively continued), which expires in December 2023, with 0 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in September 1985.
Treatment technology
4 treatment structures and unit processes identified at Ellensburg WWTP.
Available with a free Klarifi account
See the full treatment train at Ellensburg 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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Ellensburg WWTP in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Penalties assessed
- $5,100
- all cases
- EPA inspections
- 0
- none on record
Latest case · Sep 1985
ELLENSBURG, CY OF
Administrative order · TSCA, PCBS · Source Agrees · Penalty $5,100
Source: EPA ECHO, civil enforcement case 10-1986-0058.
Full case history with a free Klarifi account
Every action against Ellensburg WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
9 verified contacts for Ellensburg WWTP, with validated emails and direct phone numbers.
Unlock 9 verified contacts (6 more than shown)
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
0.18 MGD
Naches · 18 mi away
0.54 MGD
Cle Elum · 23 mi away
1.13 MGD
Ellensburg · 26 mi away
0.01 MGD
Yakima · 27 mi away
8.67 MGD
Quincy · 31 mi away
0.02 MGD
Wenatchee · 34 mi away
2.86 MGD
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 October 26, 2026; facility record last updated August 13, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms