Ferndale STP
5405 Ferndale Rd, Ferndale, WA 98248 · Whatcom County · Publicly Owned Treatment Works
- Average flow
- 2.26 MGD
- Design flow
- —
- NPDES permit
- WAR308713
- Terminated
- Permit expires
- December 2025
- Population served
- 13,198
- CWNS 2022
Ferndale STP is a publicly owned wastewater treatment works in Ferndale, Whatcom County, Washington treating an average of 2.26 million gallons per day, serving about 13,198 residents. It discharges under NPDES permit WAR308713 (terminated), which expires in December 2025, with 1 recorded violation in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Ferndale STP.
Available with a free Klarifi account
See the full treatment train at Ferndale 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
2 verified contacts for Ferndale STP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Ferndale STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Washington
Bellingham · 3 mi away
0.18 MGD
Blaine · 9 mi away
1.17 MGD
Bellingham · 9 mi away
15.62 MGD
Lynden · 10 mi away
1.56 MGD
Everson · 13 mi away
0.33 MGD
Blaine · 13 mi away
0.42 MGD
Bellingham · 13 mi away
0.0032 MGD
Orcas · 23 mi away
0.0063 MGD
Ferndale 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 13, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms