Arkansas wastewater permits expiring in 2026
60 NPDES permits · 18 MGD combined average flow
60 publicly owned wastewater treatment plants in Arkansas hold NPDES permits that expire during 2026, issued by Arkansas Division of Environmental Quality. The table lists each plant with its permit number, expiry month, average flow, treatment technology and three-year violation count, in order of expiry.
An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.
| Facility | City | Avg flow (MGD) | NPDES permit | Expires | Technology | Violations (3y) |
|---|---|---|---|---|---|---|
| Trumann WWTP | Trumann | 0.25 | AR0035602 | Jan 2026 | — | 0 |
| Manila WWTP | Manila | 0.18 | AR0021881 | Jan 2026 | Uncovered lagoons | 170 |
| Leachville WWTP | Leachville | 0.11 | AR0022012 | Jan 2026 | Clarifiers, Carrousels / oxidation ditches | 7 |
| Mount Ida WWTP | Mount Ida | 0.1 | AR0033855 | Jan 2026 | Aerated lagoons, Uncovered lagoons | 32 |
| Ulm WWTP | Ulm | 0.0058 | AR0038008 | Jan 2026 | Uncovered lagoons | 13 |
| Portia Wastewater Treatment Plant | Portia | 0.005 | AR0040355 | Jan 2026 | Uncovered lagoons | 139 |
| Egypt, City Of | Egypt | — | AR0043524 | Jan 2026 | Uncovered lagoons | 15 |
| Gillett, City Of-WWTP | Gillett | — | AR0022390 | Jan 2026 | Uncovered lagoons | 4 |
| Poyen, City Of | Poyen | — | AR0048445 | Jan 2026 | Covered lagoons, Uncovered lagoons | 64 |
| Reyno WWTP | Reyno | — | AR0022209 | Jan 2026 | Uncovered lagoons | 0 |
| Fort Smith, City Of-Massard Water Reclamation Facility | Barling | 6.78 | AR0021750 | Feb 2026 | Clarifiers, Biogas silos | 37 |
| Des Arc, City Of | Des Arc | 0.28 | AR0022225 | Feb 2026 | Uncovered lagoons | 248 |
| Huntington Sanitary Sewerage Facilities | Huntington | 0.12 | AR0037419 | Feb 2026 | Carrousels / oxidation ditches | 34 |
| Lafe WWTP | Lafe | 0.01 | AR0048909 | Feb 2026 | — | 5 |
| Marvell WWTP | Marvell | — | AR0035840 | Feb 2026 | Uncovered lagoons | 226 |
| Parkdale Wastewater Treatment Plant | Parkdale | — | AR0050997 | Feb 2026 | Uncovered lagoons | 10 |
| Benton WWTP | Benton | 3.84 | AR0036498 | Mar 2026 | Clarifiers, Carrousels / oxidation ditches | 4 |
| Eudora, City Of | Eudora | 0.81 | AR0033839 | Mar 2026 | Uncovered lagoons | 47 |
| Yellville, City Of | Yellville | 0.2 | AR0034037 | Mar 2026 | Clarifiers, Biogas silos | 29 |
| Highland WWTP | Cherokee Village | 0.07 | AR0050261 | Mar 2026 | — | 94 |
| Calico Rock WWTP | Calico Rock | 0.02 | AR0034606 | Mar 2026 | Clarifiers | 23 |
| Biscoe, City Of | Biscoe | — | AR0047589 | Mar 2026 | Uncovered lagoons | 0 |
| Madison, City Of-WWTP | Madison | — | AR0037893 | Mar 2026 | Uncovered lagoons | 37 |
| Murfreesboro WWTP | Murfreesboro | — | AR0043281 | Mar 2026 | Clarifiers, Aerated lagoons, Uncovered lagoons | 60 |
| Sparkman, City Of | Sparkman | — | AR0035939 | Mar 2026 | Uncovered lagoons | 1 |
| Wilmot, City Of | Wilmot | — | AR0050989 | Mar 2026 | Aerated lagoons, Uncovered lagoons | 73 |
| Waldron, City Of | Waldron | 0.33 | AR0035769 | Apr 2026 | Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches | 34 |
| Newark, City Of | Newark | 0.0087 | AR0021229 | Apr 2026 | Uncovered lagoons | 7 |
| Earle Waterworks | Earle | — | AR0034304 | Apr 2026 | Uncovered lagoons | 8 |
| Paris WWTP | Paris | 0.73 | AR0021857 | May 2026 | Clarifiers, Uncovered lagoons, Carrousels / oxidation ditches | 30 |
| Saline County Waterworks And Sanitary Sewer Public Facilities Board | Alexander | 0.11 | AR0044881 | May 2026 | — | 27 |
| Bradley, City Of-WWTP | Bradley | — | AR0020621 | May 2026 | Uncovered lagoons | 173 |
| City Of Sedgwick - Arkansas | Sedgwick | — | AR0043443 | May 2026 | Uncovered lagoons | 14 |
| Louann, City Of | Louann | — | AR0040517 | May 2026 | Uncovered lagoons | 163 |
| Dyess WWTP | Dyess | 0.12 | AR0039047 | Jun 2026 | — | 16 |
| Altheimer WWTP | Altheimer | 0.04 | AR0034771 | Jun 2026 | Aerated lagoons, Uncovered lagoons | 9 |
| Rockport, City Of - WWTF | Rockport | 0.006 | AR0052663 | Jul 2026 | — | 149 |
| 145th Street Water And Sewer Improvement District No. 345 Of Pulaski County | Little Rock | — | AR0040266 | Jul 2026 | Uncovered lagoons | 90 |
| Emmet, City Of | Emmet | — | AR0041815 | Jul 2026 | Uncovered lagoons | 3 |
| Grady, City Of-WWTP | Grady | — | AR0039381 | Jul 2026 | Uncovered lagoons | 96 |
| Sherwood, City Of-South Facility | Sherwood | 0.36 | AR0045608 | Aug 2026 | Uncovered lagoons | 7 |
| Lochridge Estates WWTP | Little Rock | 0.0097 | AR0050521 | Aug 2026 | — | 67 |
| Russell Waterworks | Russell | 0.0003 | AR0022217 | Aug 2026 | Uncovered lagoons | 17 |
| Joiner, City Of-WWTP | Joiner | 0.07 | AR0022152 | Sep 2026 | Uncovered lagoons | 70 |
| Sugarloaf Wastewater Treatment | Lead Hill | 0.03 | AR0043753 | Sep 2026 | Clarifiers, Carrousels / oxidation ditches | 11 |
| Sulphur Springs WWTP | Sulphur Springs | 0.01 | AR0051179 | Sep 2026 | — | 28 |
| Ola WWTP | Ola | 0.26 | AR0035688 | Oct 2026 | Aerated lagoons, Uncovered lagoons | 14 |
| Burdette WWTP | Burdette | 0.0036 | AR0044237 | Oct 2026 | Uncovered lagoons | 260 |
| Cherry Valley, City Of - Cherry Valley Sewage Treatment Plant | Cherry Valley | — | AR0021393 | Oct 2026 | Biogas silos | 0 |
| Colt WWTP | Colt | — | AR0043192 | Oct 2026 | Uncovered lagoons | 45 |
| Mcneil, City Of - Wastewater Treatment Plant | Mcneil | — | AR0021555 | Oct 2026 | Uncovered lagoons | 0 |
| Tuckerman, City Of - Wastewater Treatment Plant | Tuckerman | — | AR0020001 | Oct 2026 | Uncovered lagoons | 187 |
| Bald Knob, City Of - Wastewater Treatment Facility | Bald Knob | 0.21 | AR0035807 | Nov 2026 | Covered lagoons, Uncovered lagoons | 65 |
| Oppelo, City Of - Oppelo Municipal Sewage Treatment Plant | Oppelo | 0.0036 | AR0047643 | Nov 2026 | Uncovered lagoons | 31 |
| City Of St. Charles Stf | Saint Charles | — | AR0049310 | Nov 2026 | Uncovered lagoons | 30 |
| Gould, City Of-WWTF | Gould | — | AR0021679 | Nov 2026 | Uncovered lagoons | 121 |
| Grubbs, City Of | Grubbs | — | AR0034614 | Nov 2026 | Uncovered lagoons | 4 |
| Northwest Arkansas Conservation Authority -Regional WWTP | Bentonville | 3.26 | AR0050024 | Dec 2026 | Clarifiers, Carrousels / oxidation ditches, Biogas balloons | 158 |
| Prairie Grove WWTP | Prairie Grove | — | ARG640066 | Dec 2026 | — | 91 |
| Stone Dam Creek Wastewater Treatment Plant | Conway | — | ARG640051 | Dec 2026 | Clarifiers, Biogas silos | 0 |
Arkansas permit renewals in 2026: 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.