City Of Helena WWTP
Helena, MT · Lewis And Clark County · Publicly Owned Treatment Works
- Average flow
- 3.14 MGD
- Design flow
- —
- NPDES permit
- MT0022641
- Administratively continued
- Permit expires
- September 2017
- Population served
- 32,091
- CWNS 2022
City Of Helena WWTP is a publicly owned wastewater treatment works in Helena, Lewis And Clark County, Montana treating an average of 3.14 million gallons per day, serving about 32,091 residents. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit MT0022641 (administratively continued), which expires in September 2017, with 37 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 37
- Effluent violations
- 31
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 Helena WWTP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at City Of Helena WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Montana
East Helena · 4 mi away
0.18 MGD
Wolf Creek · 27 mi away
0.0018 MGD
Boulder · 28 mi away
0.09 MGD
Townsend · 30 mi away
0.19 MGD
Deer Lodge · 37 mi away
0.72 MGD
Warm Springs · 48 mi away
0.12 MGD
White Sulphur Springs · 52 mi away
0.05 MGD
Anaconda · 53 mi away
0.66 MGD
City Of Helena 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 March 1, 2025.