Mississippi wastewater permits expiring in 2028
22 NPDES permits · 15 MGD combined average flow
22 publicly owned wastewater treatment plants in Mississippi hold NPDES permits that expire during 2028, 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) |
|---|---|---|---|---|---|
| Waynesboro POTW | Waynesboro | 1.07 | MS0024228 | Jan 2028 | 30 |
| Diamondhead Water Sewer District | Diamondhead | 0.98 | MS0046078 | Feb 2028 | 0 |
| Puckett POTW | Puckett | 0.02 | MS0055590 | Feb 2028 | 198 |
| Neshoba County | Philadelphia | 0.11 | MS0043478 | Mar 2028 | 50 |
| Natchez POTW | Natchez | 2.14 | MS0024252 | Mar 2028 | 0 |
| Pickens POTW | Pickens | — | MS0021130 | Mar 2028 | 1 |
| Clarksdale POTW | Clarksdale | 1.76 | MS0020311 | Apr 2028 | 99 |
| Standing Pine WWTF | Conehatta | 0.04 | MS0043494 | May 2028 | 28 |
| University Of Mississippi, The | University | — | MS0021873 | May 2028 | 56 |
| West Biloxi Wastewater Treatment Plant | Biloxi | 5.57 | MS0030333 | Jun 2028 | 1 |
| Blue Mountain POTW | Blue Mountain | — | MS0025321 | Jun 2028 | 5 |
| Falkner POTW | Falkner | — | MS0029025 | Jun 2028 | 6 |
| Ackerman POTW | Ackerman | — | MS0020575 | Jul 2028 | 48 |
| Benoit POTW | Benoit | — | MS0020672 | Jul 2028 | 14 |
| Lucedale POTW | Lucedale | 0.27 | MS0044504 | Aug 2028 | 17 |
| Ecru POTW | Ecru | — | MS0035173 | Aug 2028 | 6 |
| Woodville POTW | Woodville | — | MS0054640 | Aug 2028 | 61 |
| Batesville POTW | Batesville | 0.85 | MS0024627 | Sep 2028 | 9 |
| Indianola POTW | Indianola | 1 | MS0024619 | Oct 2028 | 719 |
| Pearl River County Utility Authority, Neal Road POTW | Picayune | 0.7 | MS0061174 | Nov 2028 | 0 |
| Ms/alcorn State University | Lorman | — | MS0027855 | Nov 2028 | 388 |
| Florence POTW | Florence | 0.42 | MS0025275 | Dec 2028 | 32 |
Mississippi permit renewals in 2028: 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 · Sludge dewatering · Significant industrial user · 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 2028: Mississippi plants.” Updated October 26, 2026. https://klarifi.io/facilities/mississippi/permits-expiring/2028Need a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.