Anaerobic digesters and biogas: wastewater treatment plants in Georgia
19 plants · 7% of the state · 126 MGD reported by 16 plants
Klarifi identifies 19 publicly owned wastewater treatment plants with anaerobic digesters and biogas in Georgia, 7% of the 256 plants in the state (126 MGD reported by 16 plants). The largest is Gwinnett County Board Of Commissioners (f. Wayne Hill Wrc) in Buford at 36.74 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 Georgia
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Gwinnett County Board Of Commissioners (f. Wayne Hill Wrc) | Buford | 36.74 | GA0038130 | Dec 2026 | 0 |
| 2 | Dekalb County Department Of Watershed Management (snapfinger Creek Awtf) | Decatur | 28.92 | GA0024147 | Mar 2029 | 1 |
| 3 | South Cobb WRF | Mableton | 26.31 | GA0026158 | Jun 2027 | 3 |
| 4 | Lower Poplar Street Water Reclamation Facility | Macon | 12.68 | GAIS10060 | May 2027 | 14 |
| 5 | Quigg Branch Water Pollution Control Plant | Conyers | 4.01 | GA0047678 | Nov 2029 | 0 |
| 6 | Upper Oconee Basin Water Authority (bear Creek Water Treatment & Transmission) | Bogart | 3.32 | GAG640048 | Dec 2030 | 0 |
| 7 | Dublin, City Of (dublin Wpcp) | Dublin | 3.12 | GA0025569 | May 2029 | 6 |
| 8 | Cordele, City Of (gum Creek Wpcp) | Cordele | 2.11 | GA0024503 | Jul 2027 | 24 |
| 9 | Monroe, City Of (jack'S Creek Wpcp) | Monroe | 1.92 | GA0047171 | Dec 2030 | 5 |
| 10 | Water Pollution Control Plant | Milledgeville | 1.82 | GA0030775 | Jul 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 Georgia
Anaerobic digesters and biogas in other states
Anaerobic digesters and biogas in Georgia: 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 · FOG · Equalization tank · all terms