Lostant Wastewater Treatment Plant
Lostant, IL · La Salle County · Publicly Owned Treatment Works
- Average flow
- 0.02 MGD
- Design flow
- 0.22 MGD
- NPDES permit
- IL0075221
- Effective
- Permit expires
- October 2028
- Population served
- 423
- CWNS 2022
Lostant Wastewater Treatment Plant is a publicly owned wastewater treatment works in Lostant, La Salle County, Illinois treating an average of 0.02 million gallons per day against a permitted design capacity of 0.22 MGD, serving about 423 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit IL0075221 (effective), which expires in October 2028, with 175 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
- 175
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Lostant Wastewater Treatment Plant.
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Nearby wastewater treatment plants in Illinois
Wenona · 5 mi away
0.14 MGD
Tonica · 6 mi away
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Mcnabb · 8 mi away
0.03 MGD
Cedar Point · 9 mi away
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Oglesby · 11 mi away
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Streator · 11 mi away
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Granville · 13 mi away
0.09 MGD
Utica · 14 mi away
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Lostant Wastewater Treatment Plant: 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 7, 2025.