Spangle STP
700 N Old Sr 195 Hwy, Spangle, WA 99031 · Spokane County · Publicly Owned Treatment Works
- Average flow
- 0.02 MGD
- Design flow
- —
- NPDES permit
- WA0991010
- Effective
- Permit expires
- March 2030
- Population served
- 200
- CWNS 2022
Spangle STP is a publicly owned wastewater treatment works in Spangle, Spokane County, Washington treating an average of 0.02 million gallons per day, serving about 200 residents. It discharges under NPDES permit WA0991010 (effective), which expires in March 2030, with 13 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Spangle STP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 13
- Effluent violations
- 13
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Spangle STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Washington
Fairfield · 10 mi away
0.06 MGD
Rockford · 11 mi away
0.07 MGD
Rosalia · 13 mi away
0.11 MGD
Medical Lake · 17 mi away
0.38 MGD
Tekoa · 20 mi away
0.12 MGD
Oakesdale · 23 mi away
0.09 MGD
Saint John · 25 mi away
0.07 MGD
Reardan · 29 mi away
0.06 MGD
Spangle STP: 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 9, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms