City Of Helena WWTP
1708 Cust Avenue, Helena, MT 59602 · Lewis And Clark County · Publicly Owned Treatment Works
- Average flow
- 3.01 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 3.01 million gallons per day, serving about 32,091 residents. It discharges under NPDES permit MT0022641 (administratively continued), which expires in September 2017, with 33 recorded violations in the last three years. EPA has recorded 3 formal enforcement actions naming the plant, the latest in July 2022.
Treatment technology
2 treatment structures and unit processes identified at City Of Helena WWTP.
Available with a free Klarifi account
See the full treatment train at City Of Helena WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 33
- Effluent violations
- 29
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for City Of Helena WWTP in EPA's ICIS system.
- Formal actions
- 3
- 2 since FY2020
- Penalties assessed
- $20,000
- all cases
- Compliance actions
- $19,250
- required by EPA orders
- EPA inspections
- 2
- latest Dec 2005
Latest case · Jul 2022
City of Helena Pretreatment
Administrative order · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $20,000
EPA's description of the case:
“The Pretreatment Regulations apply to publicly owned treatment works (POTWs) and to industrial users discharging pollutants to POTWs from non-domestic sources. The Pretreatment Regulations prohibit…”
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Source: EPA ECHO, civil enforcement case 08-2021-0211.
1 informal enforcement action (notices of violation and similar).
Full case history with a free Klarifi account
Every action against City Of Helena WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
2 verified contacts for City Of Helena WWTP, with validated emails and direct phone numbers.
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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
0.003 MGD
Boulder · 28 mi away
0.08 MGD
Townsend · 30 mi away
0.23 MGD
Deer Lodge · 37 mi away
1.13 MGD
Warm Springs · 48 mi away
0.13 MGD
White Sulphur Springs · 52 mi away
0.05 MGD
Anaconda · 53 mi away
0.44 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 October 26, 2026; facility record last updated March 1, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms