Girdwood WWTP
Girdwood, AK · Anchorage County · Publicly Owned Treatment Works
- Average flow
- 0.39 MGD
- Design flow
- —
- NPDES permit
- AK0047856
- Administratively continued
- Permit expires
- October 2005
- Population served
- 2,308
- CWNS 2022
Girdwood WWTP is a publicly owned wastewater treatment works in Girdwood, Anchorage County, Alaska treating an average of 0.39 million gallons per day, serving about 2,308 residents. Treatment on site includes biosolids mechanical dewatering, biosolids thickening, dechlorination, disinfection, chlorine/ chloramine, flow equalization and other unit processes. It discharges under NPDES permit AK0047856 (administratively continued), which expires in October 2005, with 6 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Biosolids Mechanical Dewatering
unit processBiosolids Thickening
unit processDechlorination
unit processDisinfection, chlorine/ chloramine
unit processFlow Equalization
unit processLagoon, Aerobic
unit processMedia Filtration
unit processScreening
unit processSuspended Growth, Aerobic
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 6
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Girdwood WWTP.
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Nearby wastewater treatment plants in Alaska
Eagle River · 30 mi away
1.38 MGD
Palmer · 42 mi away
0.63 MGD
Seward · 60 mi away
0.09 MGD
Seward · 61 mi away
0.58 MGD
Kenai · 77 mi away
0.43 MGD
Talkeetna · 101 mi away
0.06 MGD
Homer · 110 mi away
0.00038 MGD
Cordova · 118 mi away
0.29 MGD
Girdwood 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 September 15, 2025.