Butler WWTP
Butler, IN · De Kalb County · Publicly Owned Treatment Works
- Average flow
- 0.94 MGD
- Design flow
- 2 MGD
- NPDES permit
- IN0022462
- Administratively continued
- Permit expires
- August 2026
- Population served
- 2,635
- CWNS 2022
Butler WWTP is a publicly owned wastewater treatment works in Butler, De Kalb County, Indiana treating an average of 0.94 million gallons per day against a permitted design capacity of 2 MGD, serving about 2,635 residents. Treatment on site includes clarifiers. It discharges under NPDES permit IN0022462 (administratively continued), which expires in August 2026, with 73 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 73
- Effluent violations
- 55
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Butler WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Butler WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Indiana
Hamilton · 7 mi away
0.15 MGD
St. Joe · 9 mi away
0.05 MGD
Ashley · 12 mi away
0.13 MGD
Angola · 15 mi away
0.9 MGD
Corunna · 15 mi away
0.01 MGD
Garrett · 15 mi away
0.48 MGD
Avilla · 20 mi away
0.22 MGD
Fremont · 21 mi away
0.28 MGD
Butler 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 August 3, 2026.