Drinking water / MS

PFAS in Mississippi drinking water

239 Mississippi public water systems tested under UCMR5. 9 detected at least one PFAS compound; 230 detected none at the reporting thresholds. Values are the highest single result per compound, in ng/L (parts per trillion). The federal limit for PFOA and PFOS is 4 ng/L.

Water system	Serves	Highest results (ng/L)	Reading
CITY OF CORINTH, MS MS0020002	Alcorn	PFOS 10.6 PFBA 10PFOA 8.7* PFBS 4.3*	above final limit
CITY OF HOLLY SPRINGS MS0470002	Marshall	PFOS 9.6 PFOA 6.7* PFHxS 4.3*	above final limit
CITY OF OXFORD MS0360011	Lafayette	PFOS 72.2 PFPeA 24.56:2 FTS 22.9*PFHxA 15	above final limit
KEESLER AIR FORCE BASE MS0240049	Harrison	PFOS 7.7 *	above final limit
SMITHS CROSSING WATER ASSN MS0640014	Simpson	PFOS 10.8 *	above final limit
SUNRISE UTILITY ASSN INC MS0180013	Forrest	PFOA 5.5 *	above final limit
UNIVERSITY OF MISSISSIPPI MS0360015	Lafayette	PFPeA 11.4PFBA 8.2PFHxA 7.8PFHxS 5.6	above final limit
BROADMOOR UTILITIES, INC MS0010005	Adams	6:2 FTS 15.5	detected
CITY OF BROOKHAVEN MS0430002	Lincoln	PFBS 4.4	detected

* exceeds the final federal MCL for that compound. Detections of compounds whose limits EPA proposed to rescind in May 2026 are shown for information.

Systems with no PFAS detected

230 tested systems reported no PFAS above the laboratory reporting limits. Each has its own page with its sampling detail.

A detection at the system level does not tell you what reaches one specific tap: levels vary by entry point, treatment train and plumbing. A certified lab test of your own tap settles it. Testing and treatment options