Anaerobic digesters and biogas: wastewater treatment plants in Michigan
97 plants · 29% of the state · 424 MGD reported by 96 plants
Klarifi identifies 97 publicly owned wastewater treatment plants with anaerobic digesters and biogas in Michigan, 29% of the 334 plants in the state (424 MGD reported by 96 plants). The largest is City Of Grand Rapids Wastewater Treatment Plant in Grand Rapids at 42.18 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 Michigan
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | City Of Grand Rapids Wastewater Treatment Plant | Grand Rapids | 42.18 | MI0026069 | Oct 2029 | 9 |
| 2 | Southgate-Wyandotte Cso Rtf | Wyandotte | 34.9 | MI0036072 | Oct 2026 | 2 |
| 3 | Wyandotte Wastewater Plant | Wyandotte | 33.91 | MI0021156 | Oct 2021 | 5 |
| 4 | Anthony Ragnone Wastewater Treatment Plant | Montrose | 32.01 | MI0022977 | Oct 2023 | 3 |
| 5 | Kalamazoo Water Reclamation Plant | Kalamazoo | 27.05 | MI0023299 | Oct 2030 | 37 |
| 6 | Ycua Regional Wastewater Treatment Plant | Ypsilanti | 23.69 | MIL042676 | Dec 2030 | 5 |
| 7 | City Of Wyoming Clean Water Plant | Grandville | 16.16 | MI0024392 | Oct 2030 | 74 |
| 8 | Ann Arbor WWTP | Ann Arbor | 14.38 | MI0022217 | Oct 2025 | 9 |
| 9 | Clinton River WRRF | Pontiac | 14.29 | MI0023825 | Oct 2030 | 3 |
| 10 | Jackson WWTP | Jackson | 11.39 | MI0023256 | Oct 2027 | 4 |
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 Michigan
Anaerobic digesters and biogas in other states
Anaerobic digesters and biogas in Michigan: 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: Anaerobic digester · Biosolids · Sludge dewatering · Centrate · Lift station · Inflow and infiltration · all terms