City Of Boulder WWTF
Boulder, MT · Jefferson County · Publicly Owned Treatment Works
- Average flow
- 0.09 MGD
- Design flow
- —
- NPDES permit
- MT0023078
- Administratively continued
- Permit expires
- November 2025
- Population served
- 1,297
- CWNS 2022
City Of Boulder WWTF is a publicly owned wastewater treatment works in Boulder, Jefferson County, Montana treating an average of 0.09 million gallons per day, serving about 1,297 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit MT0023078 (administratively continued), which expires in November 2025, with 68 recorded violations in the last three years.
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
- 68
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for City Of Boulder WWTF, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at City Of Boulder WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Montana
East Helena · 28 mi away
0.18 MGD
Helena · 28 mi away
3.14 MGD
Townsend · 28 mi away
0.19 MGD
Warm Springs · 33 mi away
0.12 MGD
Deer Lodge · 33 mi away
0.72 MGD
Willow Creek · 35 mi away
—
Three Forks · 36 mi away
0.31 MGD
Anaconda · 37 mi away
0.66 MGD
City Of Boulder 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 April 24, 2025.