Willapa Regional WWTF
151 Wa-105, Raymond, WA 98577 · Pacific County · Publicly Owned Treatment Works
- Average flow
- 1.01 MGD
- Design flow
- —
- NPDES permit
- WA0041041
- Effective
- Permit expires
- February 2030
- Population served
- —
- CWNS 2022
Willapa Regional WWTF is a publicly owned wastewater treatment works in Raymond, Pacific County, Washington treating an average of 1.01 million gallons per day. It discharges under NPDES permit WA0041041 (effective), which expires in February 2030, with 0 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Willapa Regional WWTF.
Available with a free Klarifi account
See the full treatment train at Willapa Regional WWTF: 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.
Key contacts
Decision-makers at Willapa Regional WWTF.
No verified contacts on file yet
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Nearby wastewater treatment plants in Washington
Montesano · 20 mi away
0.27 MGD
Hoquiam · 21 mi away
1.19 MGD
Pe Ell · 23 mi away
0.31 MGD
Ilwaco · 30 mi away
0.22 MGD
Littlerock · 32 mi away
0.05 MGD
Rochester · 35 mi away
0.17 MGD
Cathlamet · 38 mi away
0.23 MGD
Ryderwood · 39 mi away
0.1 MGD
Willapa Regional WWTF: 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 May 29, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms