Anaerobic digesters and biogas: wastewater treatment plants in Indiana
59 plants · 14% of the state · 350 MGD reported by 58 plants
Klarifi identifies 59 publicly owned wastewater treatment plants with anaerobic digesters and biogas in Indiana, 14% of the 432 plants in the state (350 MGD reported by 58 plants). The largest is Indianapolis Belmont WWTP in Indianapolis at 83.83 MGD.
Anaerobic digesters stabilise sludge in sealed heated tanks and produce biogas, visible from the air as digester silos and gas holders. Plants with digesters are typically above 5 MGD and are the buyers of mixing, heating, gas handling, cogeneration and dewatering equipment.
The largest plants with anaerobic digesters in Indiana
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Indianapolis Belmont WWTP | Indianapolis | 83.83 | IN0023183 | May 2029 | 116 |
| 2 | Gary Sanitary District | Gary | 32.6 | IN0022977 | Jun 2027 | 24 |
| 3 | Water Pollution Control Plant | Fort Wayne | 29.9 | IN0032191 | Feb 2026 | 2 |
| 4 | Saniatry District Of Hammond | Hammond | 25.83 | IN0023060 | Apr 2027 | 21 |
| 5 | City Of South Bend Wastewater Treatment Plant | South Bend | 23.29 | IN0024520 | Nov 2026 | 4 |
| 6 | Lafayette WWTP | Lafayette | 15.2 | IN0032468 | Jul 2028 | 0 |
| 7 | Muncie Water Pollution Control Facility | Muncie | 12.2 | IN0025631 | Jun 2029 | 0 |
| 8 | Evansville Westside WWTP | Evansville | 10.6 | IN0032956 | Jan 2027 | 10 |
| 9 | Eastside Wastewater Treatment Plant | Evansville | 9.8 | IN0033073 | Jan 2027 | 13 |
| 10 | Mishawaka Wastewater Treatment Plant | Mishawaka | 9.43 | IN0025640 | Apr 2027 | 2 |
| 11 | Elkhart Public Works And Utilities | Elkhart | 9.19 | IN0025674 | Apr 2027 | 179 |
| 12 | West Lafayette WWTP | West Lafayette | 7.9 | IN0024821 | Jan 2031 | 10 |
| 13 | Anderson WWTP | Anderson | 7 | IN0032476 | Sep 2030 | 11 |
| 14 | Noblesville Wwtp, City Of | Noblesville | 6.05 | IN0020168 | May 2031 | 2 |
| 15 | Schererville WWTP | Schererville | 4.75 | IN0024457 | Jul 2028 | 8 |
| 16 | Elden Kuehl Pollution Control Facility | Valparaiso | 4.41 | IN0024660 | Sep 2027 | 3 |
| 17 | Richmond Wwtp, City Of | Richmond | 3.96 | IN0025615 | Feb 2031 | 14 |
| 18 | Shelbyville Wwtp, City Of | Shelbyville | 3.81 | IN0032867 | Mar 2031 | 24 |
| 19 | City Of La Porte - Wastewater Treatment Plant | La Porte | 3.47 | IN0025577 | Feb 2030 | 39 |
| 20 | Goshen City Waste Water Treatment Plant Improvements | Goshen | 3.1 | IN0025755 | Jun 2031 | 13 |
| 21 | Nappanee Wwtp, City Of | Nappanee | 3 | IN0021466 | Feb 2030 | 1 |
| 22 | Warsaw WWTP | Warsaw | 2.9 | IN0060917 | May 2027 | 6 |
| 23 | South Dearborn Rsd | Lawrenceburg | 2.83 | IN0024538 | Feb 2031 | 11 |
| 24 | Greenfield Wastewater Treatment Plant Improvements | Greenfield | 2.7 | IN0020109 | Nov 2029 | 56 |
| 25 | Vincennes Wastewater Treatment Facility | Vincennes | 2.68 | IN0031020 | Oct 2029 | 0 |
Contacts and project signals for every plant on this list
Klarifi adds verified decision-maker contacts, permit limits, discharge monitoring data and the capital projects planned in each city, filterable by technology, size and compliance record.
Other technologies in Indiana
Anaerobic digesters and biogas in other states
Anaerobic digesters and biogas in Indiana: 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.