Ridgefield WWTP
109 W Division St, Ridgefield, WA 98642 · Clark County · Publicly Owned Treatment Works
- Average flow
- 0.37 MGD
- Design flow
- —
- NPDES permit
- WA0023272
- Effective
- Permit expires
- September 2030
- Population served
- 5,695
- CWNS 2022
Ridgefield WWTP is a publicly owned wastewater treatment works in Ridgefield, Clark County, Washington treating an average of 0.37 million gallons per day, serving about 5,695 residents. It discharges under NPDES permit WA0023272 (effective), which expires in September 2030, with 5 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Ridgefield WWTP.
Available with a free Klarifi account
See the full treatment train at Ridgefield WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 5
- 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 Ridgefield WWTP in EPA's ICIS system.
- Formal actions
- 0
- none on record
- EPA inspections
- 2
- latest Feb 2026
No formal federal enforcement case is on record for this plant.
Full case history with a free Klarifi account
Every action against Ridgefield WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Ridgefield WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Washington
La Center · 5 mi away
0.31 MGD
Vancouver · 6 mi away
—
Kalama · 14 mi away
0.49 MGD
Yacolt · 20 mi away
—
Longview · 21 mi away
17.43 MGD
Washougal · 27 mi away
1.09 MGD
Castle Rock · 32 mi away
0.37 MGD
Toutle · 35 mi away
0.06 MGD
Ridgefield 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 April 12, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Lift station · Sludge dewatering · all terms