City Of Shelby Wastewater Lagoons
112 1st South, Shelby, MT 59474 · Toole County · Publicly Owned Treatment Works
- Average flow
- 0.57 MGD
- Design flow
- —
- NPDES permit
- MT0031488
- Administratively continued
- Permit expires
- February 2025
- Population served
- 3,728
- CWNS 2022
City Of Shelby Wastewater Lagoons is a publicly owned wastewater treatment works in Shelby, Toole County, Montana treating an average of 0.57 million gallons per day, serving about 3,728 residents. It discharges under NPDES permit MT0031488 (administratively continued), which expires in February 2025, with 20 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at City Of Shelby Wastewater Lagoons.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 20
- Effluent violations
- 19
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Shelby
Shelby's capital improvement plan lists 17 water, sewer and wastewater line items worth $33M starting 2024–2036. The largest budgeted items are shown here.
All water and sewer capital projects in Shelby →
| Project | Budget | Years |
|---|---|---|
| Phase 4 Collection Improvements | $8,792,540 | 2034–2040 |
| Distribution Improvements | $5,000,000 | 2024–2032 |
| Phase 3 Collection Improvements | $4,455,440 | 2030–2032 |
| Wellfield Clearwell: 500,000-gallon Clearwell tank | $2,500,000 | 2026–2026 |
| Prison Tank Recoating | $2,500,000 | 2036–2036 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
2 verified contacts for City Of Shelby Wastewater Lagoons, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at City Of Shelby Wastewater Lagoons, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Montana
Kevin · 16 mi away
0.0083 MGD
Cut Bank · 22 mi away
—
Valier · 23 mi away
0.02 MGD
Sunburst · 24 mi away
0.04 MGD
Conrad · 24 mi away
0.17 MGD
Sweet Grass · 33 mi away
—
Brady · 33 mi away
—
Chester · 41 mi away
—
City Of Shelby Wastewater Lagoons: 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 September 10, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms