Lagoon systems: wastewater treatment plants in Arkansas
235 plants · 73% of the state · 85 MGD reported by 192 plants
Klarifi identifies 235 publicly owned wastewater treatment plants with lagoon systems in Arkansas, 73% of the 324 plants in the state (85 MGD reported by 192 plants). The largest is Pine Bluff WW Utility-Boyd Pt in Pine Bluff at 7.33 MGD.
Lagoon systems treat wastewater in large earthen ponds over weeks of retention time, with or without mechanical aeration. They serve thousands of small towns because they are cheap to run, but they struggle with ammonia and nutrient limits, fill with sludge over decades and are the plants most often converted or upgraded when a permit is renewed.
The largest lagoons in Arkansas
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Pine Bluff WW Utility-Boyd Pt | Pine Bluff | 7.33 | ARL033316 | Dec 2030 | 16 |
| 2 | Lrwra-Fourche Creek Water Reclamation Facility | Little Rock | 7.26 | AR0040177 | Jul 2025 | 0 |
| 3 | Fayetteville - Noland WWTP | Fayetteville | 6.32 | AR0020010 | Apr 2029 | 6 |
| 4 | Jacksonville Wastewater Utility | Jacksonville | 3.97 | AR0041335 | Jan 2029 | 0 |
| 5 | Russellville WWTP | Russellville | 3.97 | ARL021768 | Dec 2030 | 46 |
| 6 | Searcy Wastewater Treatment Plant | Searcy | 3.2 | AR0021601 | Apr 2024 | 12 |
| 7 | Nlrwu-White Oak Bayou | North Little Rock | 2.92 | AR0038288 | Jul 2028 | 0 |
| 8 | Tucker Creek Wastewater Treatment Plant | Conway | 2.89 | ARL047279 | Dec 2030 | 11 |
| 9 | Green Forest, City Of - Green Forest WWTP | Green Forest | 2.53 | AR0021741 | Mar 2027 | 0 |
| 10 | Dequeen, City Of | De Queen | 2.24 | AR0021733 | Mar 2025 | 58 |
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 Arkansas
Lagoon systems in other states
Lagoon systems in Arkansas: 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: WWTP · POTW · Biosolids · FOG · Equalization tank · all terms