Crow Agency Lagoon
Crow Agency, MT · Big Horn County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 11.21 MGD
- NPDES permit
- MTG589009
- Effective
- Permit expires
- March 2027
- Population served
- —
- CWNS 2022
Crow Agency Lagoon is a publicly owned wastewater treatment works in Crow Agency, Big Horn County, Montana. Treatment on site includes aerated lagoons. It discharges under NPDES permit MTG589009 (effective), which expires in March 2027, with 850 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 850
- Effluent violations
- 25
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Crow Agency Lagoon, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Crow Agency Lagoon, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Montana
Lodge Grass · 20 mi away
—
Lame Deer · 38 mi away
0.47 MGD
Billings · 51 mi away
20.31 MGD
Forsyth · 59 mi away
0.19 MGD
Laurel · 63 mi away
0.29 MGD
Park City · 70 mi away
0.1 MGD
Joliet · 73 mi away
0.06 MGD
Bridger · 74 mi away
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Crow Agency Lagoon: 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 February 9, 2025.