City Of Arcata Wastewater Treatment Facility
600 South G St, Arcata, CA 95521 · Humboldt County · Publicly Owned Treatment Works
- Average flow
- 1.38 MGD
- Design flow
- 2.3 MGD
- NPDES permit
- CA0022713
- Expired
- Permit expires
- November 2024
- Population served
- 17,266
- CWNS 2022
City Of Arcata Wastewater Treatment Facility is a publicly owned wastewater treatment works in Arcata, Humboldt County, California treating an average of 1.38 million gallons per day against a permitted design capacity of 2.3 MGD, serving about 17,266 residents. It discharges under NPDES permit CA0022713 (expired), which expires in November 2024, with 52 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at City Of Arcata Wastewater Treatment Facility.
Available with a free Klarifi account
See the full treatment train at City Of Arcata Wastewater Treatment Facility: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 52
- Effluent violations
- 47
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
6 verified contacts for City Of Arcata Wastewater Treatment Facility, with validated emails and direct phone numbers.
Unlock 6 verified contacts (3 more than shown)
Names, validated emails and direct phone numbers for decision-makers at City Of Arcata Wastewater Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Samoa · 6 mi away
0.01 MGD
Mckinleyville · 7 mi away
0.93 MGD
Eureka · 8 mi away
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Loleta · 16 mi away
0.07 MGD
Fortuna · 18 mi away
1.13 MGD
Ferndale · 20 mi away
0.29 MGD
Rio Dell · 25 mi away
0.35 MGD
Scotia · 26 mi away
0.0031 MGD
City Of Arcata Wastewater Treatment Facility: 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 March 11, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms