Fisherman Bay STP
620 Lopez Rd, Lopez Island, WA 98261 · San Juan County · Publicly Owned Treatment Works
- Average flow
- 0.02 MGD
- Design flow
- —
- NPDES permit
- WAG994575
- Terminated
- Permit expires
- December 2026
- Population served
- 316
- CWNS 2022
Fisherman Bay STP is a publicly owned wastewater treatment works in Lopez Island, San Juan County, Washington treating an average of 0.02 million gallons per day, serving about 316 residents. It discharges under NPDES permit WAG994575 (terminated), which expires in December 2026, with 1 recorded violation in the last three years.
Treatment technology
3 treatment structures and unit processes identified at Fisherman Bay STP.
Available with a free Klarifi account
See the full treatment train at Fisherman Bay STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Fisherman Bay STP.
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Ferndale · 26 mi away
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Fisherman 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 August 19, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms