Mississippi wastewater permits expiring in 2027
20 NPDES permits · 1 MGD combined average flow
20 publicly owned wastewater treatment plants in Mississippi hold NPDES permits that expire during 2027, issued by Mississippi Department 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) |
|---|---|---|---|---|---|---|
| Hazlehurst Potw, Lagoon | Hazlehurst | — | MS0023884 | Jan 2027 | Aerated lagoons, Uncovered lagoons | 2 |
| Marietta Potw, Hcr Lagoon | Marietta | 0.0001 | MS0057088 | Feb 2027 | Uncovered lagoons | 6 |
| Tip H. Allen Water Treatment Plant | Canton | — | MS0042455 | Feb 2027 | Clarifiers | 368 |
| Vaiden POTW | Vaiden | — | MS0021504 | Feb 2027 | Uncovered lagoons | 27 |
| Jumpertown, Town Of, WWTF | Booneville | 0.06 | MS0057096 | Apr 2027 | Uncovered lagoons | 8 |
| Jcua POTW 2c | Gautier | — | MS0043010 | Apr 2027 | Clarifiers, Aerated lagoons, Carrousels / oxidation ditches | 5 |
| Merigold POTW | Merigold | — | MS0025127 | Apr 2027 | Uncovered lagoons | 10 |
| Tylertown POTW | Tylertown | — | MS0020681 | Apr 2027 | Uncovered lagoons | 12 |
| Clinton Briars POTW | Clinton | — | MS0047619 | May 2027 | Uncovered lagoons | 48 |
| D Lo POTW | D Lo | — | MS0061727 | May 2027 | Aerated lagoons | 15 |
| Shannon Potw, West | Shannon | — | MS0027405 | Jul 2027 | Aerated lagoons | 7 |
| Pontotoc County Industrial Park WWTP | Pontotoc | 0.02 | MS0057797 | Aug 2027 | Covered lagoons | 435 |
| Fayette Potw, North Lagoon | Fayette | — | MS0027766 | Aug 2027 | Uncovered lagoons | 0 |
| Fayette Potw, Southwest | Fayette | — | MS0026239 | Aug 2027 | Uncovered lagoons | 0 |
| Long Beach Industrial District Park | Long Beach | 0.35 | MS0022373 | Sep 2027 | — | 13 |
| Fayette Potw, Northeast | Fayette | — | MS0025984 | Sep 2027 | Uncovered lagoons | 0 |
| Magee POTW | Magee | — | MS0024911 | Sep 2027 | Aerated lagoons, Uncovered lagoons | 31 |
| Houston POTW | Houston | 0.28 | MS0025071 | Oct 2027 | Clarifiers, Aerated lagoons, Uncovered lagoons, Carrousels / oxidation ditches | 1 |
| Conehatta School WWTF | Conehatta | 0.03 | MS0057649 | Dec 2027 | — | 31 |
| Weir POTW | Weir | — | MS0020435 | Dec 2027 | Uncovered lagoons | 84 |
Mississippi permit renewals in 2027: 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.