Anaerobic digesters and biogas: wastewater treatment plants in South Dakota
5 plants · 4% of the state · 13 MGD reported by 4 plants
Klarifi identifies 5 publicly owned wastewater treatment plants with anaerobic digesters and biogas in South Dakota, 4% of the 120 plants in the state (13 MGD reported by 4 plants). The largest is Rapid City Water Reclamation Facility in Rapid City at 10.62 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 South Dakota
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Rapid City Water Reclamation Facility | Rapid City | 10.62 | SD0023574 | Jun 2022 | 4 |
| 2 | Vermillion, City Of | Vermillion | 1.42 | SD0020061 | Sep 2017 | 2 |
| 3 | Hot Springs, City Of | Hot Springs | 0.43 | SD0022918 | Dec 2017 | 1 |
| 4 | Mobridge, City Of | Mobridge | 0.35 | SD0020028 | Jun 2024 | 0 |
| 5 | Madison-Treatment Plant | Madison | — | SD0020010 | Jun 2027 | 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 South Dakota
Anaerobic digesters and biogas in other states
Anaerobic digesters and biogas in South Dakota: 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.