Indiana wastewater permits expiring in 2026
25 NPDES permits · 77 MGD combined average flow
25 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 | Technology | Violations (3y) |
|---|---|---|---|---|---|---|
| Water Pollution Control Plant | Fort Wayne | 29.9 | IN0032191 | Feb 2026 | Clarifiers, Biogas silos, Biogas balloons | 2 |
| East Chicago Sanitary District | East Chicago | 13.24 | IN0022829 | Jun 2026 | Clarifiers, Aerated lagoons, Carrousels / oxidation ditches | 44 |
| Butler WWTP | Butler | 0.94 | IN0022462 | Aug 2026 | Clarifiers | 73 |
| Lake Of The Woods Reg Sew Dist | Bremen | 0.06 | IN0057002 | Aug 2026 | Uncovered lagoons | 34 |
| La Otto Regional Sewer District | Laotto | 0.04 | IN0058611 | Aug 2026 | Uncovered lagoons | 3 |
| Winamac WWTP | Winamac | 0.22 | IN0020516 | Sep 2026 | Clarifiers, Aerated lagoons | 54 |
| Arcadia Wwtp, Town Of | Arcadia | 0.16 | IN0021334 | Sep 2026 | Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches | 10 |
| Silver Lake WWTP | Silver Lake | 0.04 | IN0040649 | Sep 2026 | Uncovered lagoons | 2 |
| Marengo Municipal WWTP | Marengo | 0.03 | IN0040291 | Sep 2026 | — | 2 |
| Advance Wwtp, Town Of | Advance | 0.03 | IN0039705 | Sep 2026 | — | 0 |
| Laconia Municipal WWTP | Laconia | 0.001 | IN0061239 | Sep 2026 | — | 64 |
| Farmland Municipal STP | Farmland | — | IN0021512 | Sep 2026 | Uncovered lagoons | 105 |
| Garrett WWTP | Garrett | 0.48 | IN0022969 | Oct 2026 | Clarifiers | 66 |
| Shipshewana WWTP | Shipshewana | 0.17 | IN0040622 | Oct 2026 | Clarifiers, Biogas silos, Biogas balloons | 6 |
| Tennyson Water Utility | Tennyson | 0.02 | IN0041670 | Oct 2026 | — | 17 |
| City Of South Bend Wastewater Treatment Plant | South Bend | 23.29 | IN0024520 | Nov 2026 | Clarifiers, Biogas silos, Biogas balloons | 4 |
| City Of Kokomo Waste Water Treatment Facility | Kokomo | 5.96 | IN0032875 | Nov 2026 | Clarifiers, Uncovered lagoons | 19 |
| City Of Madison, POTW | Madison | 1.39 | IN0025666 | Nov 2026 | Clarifiers | 0 |
| New Palestine WWTP | New Palestine | 0.3 | IN0042358 | Nov 2026 | Clarifiers | 1 |
| Hagerstown WWTP | Hagerstown | 0.16 | IN0020010 | Nov 2026 | Clarifiers, Carrousels / oxidation ditches | 1 |
| Monon WWTP | Monon | 0.16 | IN0021580 | Nov 2026 | Clarifiers, Uncovered lagoons | 133 |
| Waynetown Municipal WWTP | Waynetown | 0.05 | IN0020524 | Nov 2026 | — | 1 |
| Napoleon Community Rural Water Corp. | Napoleon | 0.01 | IN0023868 | Nov 2026 | Uncovered lagoons | 27 |
| Berne WWTP | Berne | 0.48 | IN0021369 | Dec 2026 | Aerated lagoons, Uncovered lagoons | 7 |
| Fairmount WWTP | Fairmount | 0.35 | IN0021105 | Dec 2026 | Clarifiers, Aerated lagoons, Uncovered lagoons, Carrousels / oxidation ditches, Biogas silos | 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 September 11, 2026.