Indiana wastewater permits expiring in 2026
15 NPDES permits · 27 MGD combined average flow
15 publicly owned wastewater treatment plants in Indiana hold NPDES permits that expire during 2026, issued by Indiana Department of Environmental Management. The table lists each plant with its permit number, expiry month, average flow, treatment technology and three-year violation count, in order of expiry.
An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.
| Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|
| East Chicago Sanitary District | East Chicago | 9.42 | IN0022829 | Jun 2026 | 41 |
| Butler WWTP | Butler | 2.12 | IN0022462 | Aug 2026 | 79 |
| Winamac WWTP | Winamac | 0.32 | IN0020516 | Sep 2026 | 53 |
| Garrett WWTP | Garrett | 0.75 | IN0022969 | Oct 2026 | 67 |
| Shipshewana WWTP | Shipshewana | 0.18 | IN0040622 | Oct 2026 | 5 |
| Tennyson Water Utility | Tennyson | 0.05 | IN0041670 | Oct 2026 | 17 |
| City Of Kokomo Waste Water Treatment Facility | Kokomo | 9.93 | IN0032875 | Nov 2026 | 21 |
| City Of Madison, POTW | Madison | 1.97 | IN0025666 | Nov 2026 | 0 |
| New Palestine WWTP | New Palestine | 0.35 | IN0042358 | Nov 2026 | 1 |
| Monon WWTP | Monon | 0.22 | IN0021580 | Nov 2026 | 129 |
| Hagerstown WWTP | Hagerstown | 0.22 | IN0020010 | Nov 2026 | 1 |
| Napoleon Community Rural Water Corp. | Napoleon | 0.09 | IN0023868 | Nov 2026 | 28 |
| Waynetown Municipal WWTP | Waynetown | 0.08 | IN0020524 | Nov 2026 | 1 |
| Berne WWTP | Berne | 0.77 | IN0021369 | Dec 2026 | 4 |
| Fairmount WWTP | Fairmount | 0.46 | IN0021105 | Dec 2026 | 111 |
Indiana permit renewals in 2026: 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.
Wastewater terms: NPDES permit · POTW · Biological nutrient removal · Tertiary treatment · Filter press · FOG · all terms
Cite this page
Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.
Klarifi. “NPDES permits expiring in 2026: Indiana wastewater plants.” Updated October 26, 2026. https://klarifi.io/facilities/indiana/permits-expiring/2026Need a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.