Chlorine disinfection: wastewater treatment plants in Mississippi
5 plants · 4% of the state · 9 MGD reported by 4 plants
Klarifi identifies 5 publicly owned wastewater treatment plants with chlorine disinfection in Mississippi, 4% of the 127 plants in the state (9 MGD reported by 4 plants). The largest is West Biloxi Wastewater Treatment Plant in Biloxi at 4.07 MGD.
Chlorine or chloramine disinfection, often followed by dechlorination before discharge, remains the most common effluent disinfection in the United States. Plants on gas chlorine are candidates for conversion to hypochlorite or UV, a recurring capital project driven by safety rules and permit limits on residual chlorine.
The largest plants with chlorine disinfection in Mississippi
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | West Biloxi Wastewater Treatment Plant | Biloxi | 4.07 | MS0030333 | Jun 2028 | 1 |
| 2 | Harrison County Wastewater And Solid Waste Management Authority, East Biloxi Pot | Biloxi | 2.85 | MS0023159 | Mar 2029 | 0 |
| 3 | Hcua, Long Beach And Pass Christian | Pass Christian | 2.4 | MS0043141 | May 2030 | 0 |
| 4 | Harrison County School District | Gulfport | 0.08 | MS0061191 | Apr 2029 | 3 |
| 5 | D Lo POTW | D Lo | — | MS0061727 | May 2027 | 15 |
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 Mississippi
Chlorine disinfection in other states
Chlorine disinfection in Mississippi: 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.