Palouse Wastewater Treatment Plant
500 W Main St, Palouse, WA 99161 · Whitman County · Publicly Owned Treatment Works
- Average flow
- 0.07 MGD
- Design flow
- —
- NPDES permit
- WA0044806
- Administratively continued
- Permit expires
- March 2020
- Population served
- 1,162
- CWNS 2022
Palouse Wastewater Treatment Plant is a publicly owned wastewater treatment works in Palouse, Whitman County, Washington treating an average of 0.07 million gallons per day, serving about 1,162 residents. It discharges under NPDES permit WA0044806 (administratively continued), which expires in March 2020, with 19 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Palouse Wastewater Treatment Plant.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 19
- Effluent violations
- 18
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Palouse Wastewater Treatment Plant.
No verified contacts on file yet
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Colton · 23 mi away
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Rosalia · 27 mi away
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Saint John · 27 mi away
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Palouse 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 October 26, 2026; facility record last updated October 5, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms