Anaerobic digesters and biogas: wastewater treatment plants in Oklahoma
18 plants · 8% of the state · 75 MGD reported by 17 plants
Klarifi identifies 18 publicly owned wastewater treatment plants with anaerobic digesters and biogas in Oklahoma, 8% of the 231 plants in the state (75 MGD reported by 17 plants). The largest is Northside Wastewater Treatment Plant in Tulsa at 17.9 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 Oklahoma
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Northside Wastewater Treatment Plant | Tulsa | 17.9 | OK0026221 | Feb 2028 | 19 |
| 2 | Ok City Water Util Trst-Deer Ck | Oklahoma City | 14.07 | OK0027561 | Aug 2029 | 39 |
| 3 | Lawton, City Of | Lawton | 11 | OK0035246 | Sep 2030 | 182 |
| 4 | Norman (main) Wwt | Norman | 10.7 | OK0029190 | Oct 2030 | 61 |
| 5 | Midwest City Wwt | Oklahoma City | 4.95 | OK0026841 | Apr 2020 | 42 |
| 6 | Stillwater, City Of | Stillwater | 4.65 | OK0027057 | Mar 2028 | 9 |
| 7 | City Of Muskogee Pollution Control Plant | Muskogee | 3.9 | OK0029131 | Dec 2030 | 41 |
| 8 | Durant City Utilities Auth | Durant | 2.1 | OK0039063 | May 2030 | 197 |
| 9 | Shawnee Municipal Auth-South | Shawnee | 1.26 | OK0026051 | Nov 2024 | 22 |
| 10 | Seminole Wwt | Seminole | 0.93 | OK0022870 | Aug 2029 | 73 |
| 11 | Mcalester East WWTP | Mcalester | 0.82 | OK0026107 | Dec 2026 | 50 |
| 12 | Cushing, City Of - South STP | Cushing | 0.82 | OK0026701 | Apr 2031 | 19 |
| 13 | Madill Pwa | Madill | 0.43 | OK0031721 | Jul 2027 | 328 |
| 14 | City Of Seneca | West Seneca | 0.32 | OK0030236 | Jan 2029 | 9 |
| 15 | Watonga, City Of | Watonga | 0.27 | OK0021911 | May 2029 | 0 |
| 16 | Wynnewood Water & Light | Wynnewood | 0.21 | OK0028282 | Jul 2026 | 21 |
| 17 | Tishomingo, City Of | Tishomingo | 0.19 | OK0031992 | Apr 2029 | 31 |
| 18 | Pauls Valley Wwt | Pauls Valley | — | OK0039071 | Apr 2031 | 143 |
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 Oklahoma
Anaerobic digesters and biogas in other states
Anaerobic digesters and biogas in Oklahoma: 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.