Clallam Bay STP
410 Frontier St, Clallam Bay, WA 98326 · Clallam County · Publicly Owned Treatment Works
- Average flow
- 0.04 MGD
- Design flow
- —
- NPDES permit
- WAG994583
- Terminated
- Permit expires
- December 2026
- Population served
- 591
- CWNS 2022
Clallam Bay STP is a publicly owned wastewater treatment works in Clallam Bay, Clallam County, Washington treating an average of 0.04 million gallons per day, serving about 591 residents. It discharges under NPDES permit WAG994583 (terminated), which expires in December 2026, with 9 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Clallam Bay STP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 9
- Effluent violations
- 9
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Clallam Bay STP.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in Washington
Clallam Bay · 2 mi away
0.09 MGD
Sekiu · 2 mi away
0.07 MGD
Forks · 38 mi away
0.13 MGD
Port Angeles · 40 mi away
2.72 MGD
Sequim · 56 mi away
0.64 MGD
Friday Harbor · 60 mi away
0.4 MGD
Lopez Island · 64 mi away
0.02 MGD
Orcas · 64 mi away
0.0063 MGD
Clallam Bay 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 October 6, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms