Gillette WWTF
Gillette, WY · Campbell County · Publicly Owned Treatment Works
- Average flow
- 2.92 MGD
- Design flow
- —
- NPDES permit
- WY0020125
- Effective
- Permit expires
- July 2027
- Population served
- —
- CWNS 2022
Gillette WWTF is a publicly owned wastewater treatment works in Gillette, Campbell County, Wyoming treating an average of 2.92 million gallons per day. Treatment on site includes clarifiers, uncovered lagoons, biogas silos, biogas balloons. It discharges under NPDES permit WY0020125 (effective), which expires in July 2027, with 7 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Uncovered lagoons
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Biogas silos
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Biogas balloons
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Compliance snapshot (last 3 years)
- Total violations
- 7
- Effluent violations
- 7
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Gillette
Gillette's capital improvement plan lists 49 water, sewer and wastewater line items worth $59M starting 2025–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Gillette →
| Project | Budget | Years |
|---|---|---|
| Well Rehabilitations (Down Hole Pump & Motor) | $3,975,000 | 2025–2030 |
| Osborne Waterline Replacement | $3,500,000 | 2028–2029 |
| Echeta Road Reconstruction | $3,300,000 | 2025–2026 |
| Killamey Subdivision Waler Replacement - Phase II | $3,200,000 | 2026–2028 |
| 4th Avenue Reconstruction | $3,200,000 | 2028–2029 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
Decision-makers at Gillette WWTF.
No verified contacts on file yet
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Nearby wastewater treatment plants in Wyoming
Moorcroft · 23 mi away
0.21 MGD
Wright · 35 mi away
0.09 MGD
Upton · 43 mi away
0.05 MGD
Clearmont · 53 mi away
—
Buffalo · 65 mi away
0.79 MGD
Kaycee · 71 mi away
—
Sheridan · 82 mi away
2.21 MGD
Ranchester · 94 mi away
0.11 MGD
Gillette WWTF: 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 May 29, 2025.