Leaf River - WWTP
Leaf River, IL · Ogle County · Publicly Owned Treatment Works
- Average flow
- 0.04 MGD
- Design flow
- 0.14 MGD
- NPDES permit
- IL0029475
- Effective
- Permit expires
- July 2029
- Population served
- 403
- CWNS 2022
Leaf River - WWTP is a publicly owned wastewater treatment works in Leaf River, Ogle County, Illinois treating an average of 0.04 million gallons per day against a permitted design capacity of 0.14 MGD, serving about 403 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit IL0029475 (effective), which expires in July 2029, with 79 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
- 79
- Effluent violations
- 79
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Leaf River - WWTP.
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Nearby wastewater treatment plants in Illinois
German Valley · 7 mi away
0.02 MGD
Seward · 8 mi away
0.007 MGD
Byron · 8 mi away
0.28 MGD
Forreston · 9 mi away
0.08 MGD
Oregon · 9 mi away
0.29 MGD
Pecatonica · 13 mi away
0.14 MGD
Polo · 14 mi away
0.23 MGD
Shannon · 17 mi away
0.18 MGD
Leaf River - 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 November 6, 2025.