Joliet WWTP
Joliet, MT · Carbon County · Publicly Owned Treatment Works
- Average flow
- 0.06 MGD
- Design flow
- —
- NPDES permit
- MT0020249
- Effective
- Permit expires
- December 2027
- Population served
- 577
- CWNS 2022
Joliet WWTP is a publicly owned wastewater treatment works in Joliet, Carbon County, Montana treating an average of 0.06 million gallons per day, serving about 577 residents. Treatment on site includes aerated lagoons. It discharges under NPDES permit MT0020249 (effective), which expires in December 2027, with 28 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
Unlock
Unlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 28
- Effluent violations
- 28
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Joliet WWTP, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Joliet WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Montana
Park City · 10 mi away
0.1 MGD
Bridger · 14 mi away
—
Laurel · 15 mi away
0.29 MGD
Columbus · 16 mi away
0.14 MGD
Red Lodge · 23 mi away
0.57 MGD
Billings · 32 mi away
20.31 MGD
Big Timber · 53 mi away
—
Lavina · 56 mi away
—
Joliet 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 August 19, 2026.