Toledo STP
801 S 1st St, Toledo, WA 98591 · Lewis County · Publicly Owned Treatment Works
- Average flow
- 0.1 MGD
- Design flow
- —
- NPDES permit
- WA0036986
- Effective
- Permit expires
- November 2028
- Population served
- 614
- CWNS 2022
Toledo STP is a publicly owned wastewater treatment works in Toledo, Lewis County, Washington treating an average of 0.1 million gallons per day, serving about 614 residents. It discharges under NPDES permit WA0036986 (effective), which expires in November 2028, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Toledo STP.
Treatment structure data not yet analyzed for this facility.
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 Toledo STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Washington
Toledo · 3 mi away
0.002 MGD
Winlock · 6 mi away
0.54 MGD
Toutle · 10 mi away
0.06 MGD
Ryderwood · 10 mi away
0.1 MGD
Chehalis · 11 mi away
0.07 MGD
Castle Rock · 12 mi away
0.37 MGD
Mossyrock · 14 mi away
0.02 MGD
Longview · 23 mi away
17.43 MGD
Toledo 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 September 4, 2024.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms