Mississippi wastewater permits expiring in 2027
23 NPDES permits · 4 MGD combined average flow
23 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 | Violations (3y) |
|---|---|---|---|---|---|
| Hazlehurst Potw, Lagoon | Hazlehurst | — | MS0023884 | Jan 2027 | 2 |
| Marietta Potw, Hcr Lagoon | Marietta | 0.0001 | MS0057088 | Feb 2027 | 6 |
| Tip H. Allen Water Treatment Plant | Canton | — | MS0042455 | Feb 2027 | 368 |
| Vaiden POTW | Vaiden | — | MS0021504 | Feb 2027 | 27 |
| Jumpertown, Town Of, WWTF | Booneville | 0.06 | MS0057096 | Apr 2027 | 8 |
| Merigold POTW | Merigold | 0.06 | MS0025127 | Apr 2027 | 10 |
| Tylertown POTW | Tylertown | — | MS0020681 | Apr 2027 | 12 |
| West Point Potw, West | West Point | 2.3 | MS0020788 | May 2027 | 11 |
| Clinton Briars POTW | Clinton | — | MS0047619 | May 2027 | 48 |
| D Lo POTW | D Lo | — | MS0061727 | May 2027 | 15 |
| Shannon Potw, West | Shannon | — | MS0027405 | Jul 2027 | 7 |
| Silver Creek POTW | Silver Creek | — | MS0025453 | Jul 2027 | 91 |
| Pontotoc County Industrial Park WWTP | Pontotoc | 0.02 | MS0057797 | Aug 2027 | 435 |
| Fayette Potw, North Lagoon | Fayette | — | MS0027766 | Aug 2027 | 0 |
| Fayette Potw, Southwest | Fayette | — | MS0026239 | Aug 2027 | 0 |
| Long Beach Industrial District Park | Long Beach | 0.22 | MS0022373 | Sep 2027 | 13 |
| Fayette Potw, Northeast | Fayette | — | MS0025984 | Sep 2027 | 0 |
| Magee POTW | Magee | — | MS0024911 | Sep 2027 | 31 |
| Houston POTW | Houston | 0.53 | MS0025071 | Oct 2027 | 0 |
| Pearl River County Utility Authority, Poplarville POTW | Poplarville | 0.31 | MS0020494 | Oct 2027 | 1 |
| Nicholson Water And Sewer Association Inc | Picayune | 0.17 | MS0033871 | Nov 2027 | 1 |
| Conehatta School WWTF | Conehatta | 0.03 | MS0057649 | Dec 2027 | 31 |
| Weir POTW | Weir | — | MS0020435 | Dec 2027 | 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 October 26, 2026.
Wastewater terms: NPDES permit · POTW · Biological nutrient removal · Tertiary treatment · Inflow and infiltration · Sludge dewatering · all terms
Cite this page
Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.
Klarifi. “NPDES permits expiring in 2027: Mississippi plants.” Updated October 26, 2026. https://klarifi.io/facilities/mississippi/permits-expiring/2027Need a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.