Mississippi tap water
5 of 231 Mississippi water systems with full PFAS testing (2%) averaged above a 2024 federal PFAS level at one or more sampling points.
- 1,005 active community water systems in the EPA file; 196 serve 3,300+ people and have a full PFAS set.
- 244 systems had at least one health-based violation since 2021-10-26.
- 9 systems report a lead 90th percentile above 15 ppb (some results are old; check each system page).
Largest systems
| System | People served | PFAS above a 2024 level? | Health-based violations since 2021-10-26 |
|---|---|---|---|
| City of Jackson | 189,673 | No | 16 |
| City of Gulfport | 75,056 | No | 0 |
| City of Southaven | 56,000 | No | 0 |
| City of Olive Branch | 54,025 | No | 0 |
| City of Hattiesburg | 43,449 | No | 0 |
| City of Tupelo | 37,000 | No | 0 |
| City of Meridian | 34,466 | No | 0 |
| City of Starkville | 32,027 | No | 0 |
Counties
All 5 utilities with a page in Mississippi
- City of Gulfport 75,056
- City of Hattiesburg 43,449
- City of Jackson 189,673
- City of Olive Branch 54,025
- City of Southaven 56,000
Why not "the state's water quality"? You drink from one utility, not a state. Rollups count systems, not people, so one large utility counts the same as a small one. Use the system pages for your actual water.
Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.
Sources and freshness
Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.