Town Of Darby WWTF
Darby, MT · Ravalli County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- —
- NPDES permit
- MTG580011
- Effective
- Permit expires
- December 2027
- Population served
- —
- CWNS 2022
Town Of Darby WWTF is a publicly owned wastewater treatment works in Darby, Ravalli County, Montana. Treatment on site includes aerated lagoons. It discharges under NPDES permit MTG580011 (effective), which expires in December 2027, with 13 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
- 13
- Effluent violations
- 8
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Town Of Darby WWTF, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Town Of Darby WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Montana
Hamilton · 16 mi away
0.79 MGD
Stevensville · 34 mi away
0.21 MGD
Philipsburg · 47 mi away
0.07 MGD
Missoula · 59 mi away
7.52 MGD
Anaconda · 62 mi away
0.66 MGD
Warm Springs · 67 mi away
0.12 MGD
Alberton · 69 mi away
0.02 MGD
Deer Lodge · 74 mi away
0.72 MGD
Town Of Darby 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 November 8, 2025.