City Of Ferndale WWTP
Ferndale, CA · Humboldt County · Publicly Owned Treatment Works
- Average flow
- 0.15 MGD
- Design flow
- 0.95 MGD
- NPDES permit
- CA0022721
- Expired
- Permit expires
- December 2023
- Population served
- 1,350
- CWNS 2022
City Of Ferndale WWTP is a publicly owned wastewater treatment works in Ferndale, Humboldt County, California treating an average of 0.15 million gallons per day against a permitted design capacity of 0.95 MGD, serving about 1,350 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit CA0022721 (expired), which expires in December 2023, with 56 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
Unlock
Unlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 56
- Effluent violations
- 56
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for City Of Ferndale WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at City Of Ferndale WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Loleta · 4 mi away
0.05 MGD
Fortuna · 5 mi away
0.71 MGD
Rio Dell · 11 mi away
—
Eureka · 12 mi away
3.08 MGD
Samoa · 16 mi away
0.0088 MGD
Arcata · 20 mi away
1.47 MGD
Mckinleyville · 25 mi away
—
Redway · 39 mi away
—
City Of Ferndale 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 September 11, 2026; facility record last updated November 6, 2025.