PFAS Testing Results
Mississippi
PFAS testing results for 239 water systems serving 2,302,617 residents.
7 systems exceed federal PFAS limits, affecting 98,706 residents.
Systems tested
239
3.8% had PFAS detections
Limits exceeded
7
2.9% of systems
Population affected
99K
served by systems over federal limits
Most common compound
11Cl-PF3OUdS
detected in 9 systems
Grade distribution
Every water system gets a letter grade based on how its worst detected PFAS compound compares to the federal Maximum Contaminant Level. Lower grades mean higher contamination.
Communities exceeding federal limits
The water systems in Mississippi where at least one PFAS compound exceeds the EPA Maximum Contaminant Level, sorted worst first.
| System name | City | Grade | Worst compound | Times over limit | Population |
|---|---|---|---|---|---|
| CITY OF OXFORD | OXFORD | F | PFOS | 13.2x | 29K |
| CITY OF CORINTH, MS | GLEN | D | PFOS | 2.6x | 15K |
| CITY OF HOLLY SPRINGS | HOLLKY SPRINGS | D | PFOS | 2.4x | 9.8K |
| SMITHS CROSSING WATER ASSN | MAGEE | D | PFOS | 2.1x | 4.5K |
| KEESLER AIR FORCE BASE | BILOXI | D | PFOS | 1.9x | 8.0K |
| SUNRISE UTILITY ASSN INC | PETAL | D | PFOA | 1.4x | 6.1K |
| UNIVERSITY OF MISSISSIPPI | OXFORD | D | PFOA | 1.2x | 27K |
Resources for taking action are available in our community toolkit.
What Mississippi is doing about PFAS
As of April 2026, Mississippi has not adopted state-level PFAS drinking water standards beyond the federal EPA limits finalized in April 2024. The Mississippi Department of Environmental Quality has not published enforceable state MCLs.
Public water systems in Mississippi are subject to the federal compliance timeline requiring initial monitoring by 2027 and treatment installation by 2029.
Based on Mississippi Department of Environmental Quality publications.
All 239 tested water systems in Mississippi
Sorted from lowest grade to highest. Click any system name for the full report. Filter by city or name with the search box below.
Showing 50 of 239 systems
| Grade | System name | City | Worst compound | vs. EPA limit | Population |
|---|---|---|---|---|---|
F | CITY OF OXFORD | OXFORD | PFOS | 13.2× the federal limit | 29K |
D | CITY OF CORINTH, MS | GLEN | PFOS | 2.6× the federal limit | 15K |
D | CITY OF HOLLY SPRINGS | HOLLKY SPRINGS | PFOS | 2.4× the federal limit | 9.8K |
D | SMITHS CROSSING WATER ASSN | MAGEE | PFOS | 2.1× the federal limit | 4.5K |
D | KEESLER AIR FORCE BASE | BILOXI | PFOS | 1.9× the federal limit | 8.0K |
D | SUNRISE UTILITY ASSN INC | PETAL | PFOA | 1.4× the federal limit | 6.1K |
D | UNIVERSITY OF MISSISSIPPI | OXFORD | PFOA | 1.2× the federal limit | 27K |
B | BROADMOOR UTILITIES, INC | NATCHEZ | 6:2FTS | Below detection | 1.2K |
B | CITY OF BROOKHAVEN | BROOKHAVEN | PFBS | Below detection | 13K |
A | CITY OF NATCHEZ | NATCHEZ | - | Below detection | 15K |
A | ADAMS CO W/A #2-SOUTH | WASHINGTON | - | Below detection | 8.1K |
A | ADAMS CO W/A #4-KAISER LAKE | WASHINGTON | - | Below detection | 8.1K |
A | FARMINGTON WATER ASSOCIATION | CORINTH | - | Below detection | 6.9K |
A | ALCORN W/A #1-INDIAN SPRINGS | CORINTH | - | Below detection | 5.5K |
A | KOSSUTH W/A #3-PINE MOUNTAIN | CORINTH | - | Below detection | 5.8K |
A | CITY OF KOSCIUSKO | KOSCIUSKO | - | Below detection | 9.6K |
A | CITY OF CLEVELAND, MS | CLEVELAND | - | Below detection | 16K |
A | TOWN OF DUNCAN | DUNCAN | - | Below detection | 341 |
A | TOWN OF RENOVA | RENOVA | - | Below detection | 1.4K |
A | TOWN OF DERMA | DERMA | - | Below detection | 957 |
A | DUNCAN HILL WATER SUPPLY | CALHOUN CITY | - | Below detection | 370 |
A | CITY OF HOUSTON | HOUSTON | - | Below detection | 3.8K |
A | PATTISON W/A-WEST | PATTISON | - | Below detection | 2.9K |
A | TOWN OF PORT GIBSON | PORT GIBSON | - | Below detection | 3.0K |
A | ALCORN STATE UNIVERSITY | ALCORN STATE | - | Below detection | 3.0K |
A | EAST QUITMAN W/A | QUITMAN | - | Below detection | 3.5K |
A | CITY OF WEST POINT | WEST POINT | - | Below detection | 15K |
A | CLARKSDALE PUBLIC UTILITIES | CLARKSDALE | - | Below detection | 15K |
A | CRYSTAL SPRINGS WATER SERVICE | CRYSTAL SPRINGS | - | Below detection | 6.0K |
A | TOWN OF HAZLEHURST | HAZLEHURST | - | Below detection | 3.6K |
A | COPIAH-NEW ZION WATER ASSN,INC | CRYSTAL SPRINGS | - | Below detection | 3.8K |
A | SANDERSON FARMS, INC | HAZLEHURST | - | Below detection | 625 |
A | SOUTHWEST COVINGTON W/A | SEMINARY | - | Below detection | 3.6K |
A | CITY OF HERNANDO-JAYBIRD | HERNANDO | - | Below detection | 6.8K |
A | EUDORA UTILITIES ASSOCIATION | HERNANDO | - | Below detection | 3.7K |
A | CITY OF HERNANDO | HERNANDO | - | Below detection | 14K |
A | HORN LAKE WATER ASSOCIATION | HORN LAKE | - | Below detection | 13K |
A | LEWISBURG WATER ASSOCIATION | OLIVE BRANCH | - | Below detection | 9.4K |
A | NESBIT WATER ASSOCIATION | NESBIT | - | Below detection | 5.7K |
A | CITY OF OLIVE BRANCH | OLIVE BRANCH | - | Below detection | 54K |
A | CITY OF SOUTHAVEN | SOUTHAVEN | - | Below detection | 56K |
A | CITY OF HORN LAKE | HORN LAKE | - | Below detection | 14K |
A | WALLS WATER ASSN- LAKE FOREST | WALLS | - | Below detection | 9.3K |
A | BARRONTOWN W/A | PETAL | - | Below detection | 8.0K |
A | DIXIE COMMUNITY UTILITY ASSN. | HATTIESBURG | - | Below detection | 5.8K |
A | GLENDALE UTILITY DISTRICT | HATTIESBURG | - | Below detection | 4.5K |
A | CITY OF HATTIESBURG | HATTIESBURG | - | Below detection | 43K |
A | CITY OF PETAL | PETAL | - | Below detection | 9.5K |
A | S MS PUBLIC WATER AUTH-ROCK HILL | HATTIESBURG | - | Below detection | 803 |
A | COMBINED UTILITIES | LUCEDALE | - | Below detection | 6.7K |
Check your water system
Enter your zip code to see the PFAS results for the water system that serves your home.
Where this data comes from
- EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5)
- Testing period: 2023 to 2026
- Federal limits: EPA Maximum Contaminant Levels finalized April 2024
- Read the full methodology