Anaerobic digesters and biogas: wastewater treatment plants in Wyoming
6 plants · 11% of the state · 18 MGD combined
Klarifi identifies 6 publicly owned wastewater treatment plants with anaerobic digesters and biogas in Wyoming, 11% of the 56 plants in the state (18 MGD combined). The largest is Sam H. Hobbs Regional WW Facility (prev. Casper Wwtf) in Casper at 6.67 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 Wyoming
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Sam H. Hobbs Regional WW Facility (prev. Casper Wwtf) | Casper | 6.67 | WY0021920 | Oct 2030 | 13 |
| 2 | Dry Creek Water Reclamation Facility | Cheyenne | 4.8 | WY0022934 | Oct 2028 | 1 |
| 3 | Gillette WWTF | Gillette | 2.92 | WY0020125 | Jul 2027 | 7 |
| 4 | Rock Springs Water Reclamation Facility | Rock Springs | 2 | WY0022357 | Mar 2029 | 19 |
| 5 | Evanston WWTF | Evanston | 0.96 | WY0020095 | Aug 2029 | 0 |
| 6 | Kemmerer Wastewater Treatment | Kemmerer | 0.23 | WY0020320 | Aug 2028 | 43 |
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 Wyoming
Anaerobic digesters and biogas in other states
Anaerobic digesters and biogas in Wyoming: 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.