Manderson Sewer Project
Manderson, WY · Big Horn County · Publicly Owned Treatment Works
- Average flow
- 0.02 MGD
- Design flow
- —
- NPDES permit
- WY0052442
- Effective
- Permit expires
- January 2029
- Population served
- —
- CWNS 2022
Manderson Sewer Project is a publicly owned wastewater treatment works in Manderson, Big Horn County, Wyoming treating an average of 0.02 million gallons per day. It discharges under NPDES permit WY0052442 (effective), which expires in January 2029, with 80 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 80
- Effluent violations
- 80
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Manderson Sewer Project.
No verified contacts on file yet
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Nearby wastewater treatment plants in Wyoming
Basin · 9 mi away
0.55 MGD
Greybull · 17 mi away
—
Worland · 18 mi away
0.71 MGD
Ten Sleep · 30 mi away
—
Byron · 44 mi away
0.07 MGD
Thermopolis · 45 mi away
0.3 MGD
Meeteetse · 45 mi away
—
Powell · 51 mi away
2.09 MGD
Manderson Sewer Project: 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 March 2, 2025.