Great Plains Hall Wastewater
Fort Washakie, WY · Fremont County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.1 MGD
- NPDES permit
- WYG589102
- Effective
- Permit expires
- March 2027
- Population served
- —
- CWNS 2022
Great Plains Hall Wastewater is a publicly owned wastewater treatment works in Fort Washakie, Fremont County, Wyoming. Treatment on site includes uncovered lagoons. It discharges under NPDES permit WYG589102 (effective), which expires in March 2027.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- —
- Effluent violations
- —
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Great Plains Hall Wastewater.
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Nearby wastewater treatment plants in Wyoming
Hudson · 7 mi away
0.25 MGD
Lander · 15 mi away
1.24 MGD
Ethete · 17 mi away
0.0062 MGD
Fort Washakie · 18 mi away
0.1 MGD
Thermopolis · 49 mi away
0.3 MGD
Dubois · 69 mi away
0.06 MGD
Worland · 76 mi away
0.71 MGD
Meeteetse · 83 mi away
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Great Plains Hall Wastewater: 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 April 13, 2025.