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CheckYourWater

PFAS Testing Results

Louisiana

PFAS testing results for 268 water systems serving 4,575,271 residents.

Systems tested

268

17.5% had PFAS detections

Limits exceeded

7

2.6% of systems

Population affected

441K

served by systems over federal limits

Most common compound

11Cl-PF3OUdS

detected in 35 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.

A — 221 systems (82.5%)
B — 39 systems (14.6%)
C — 1 system (0.4%)
D — 6 systems (2.2%)
F — 1 system (0.4%)

How grades are calculated →

Communities exceeding federal limits

The water systems in Louisiana where at least one PFAS compound exceeds the EPA Maximum Contaminant Level, sorted worst first.

System nameCityGradeWorst compoundTimes over limitPopulation
CITY OF VIDALIA WATER SYSTEMVIDALIA
PFOA5.0x6.4K
VILLAGE OF PARKS WATER SYSTEMPARKS
PFOA1.6x13K
CITY OF PLAQUEMINE WATER SYSTEMPLAQUEMINE
PFOA1.6x14K
PARISH UTILITIES OF ASCENSIONDONALDSONVILLE
PFOS1.1x9.7K
NEW ORLEANS ALGIERS WATER WORKSNEW ORLEANS
PFOS1.1x53K
PORT SULPHUR WATER DISTRICTBELLE CHASSE
PFOS1.1x10K
NEW ORLEANS CARROLLTON WWNEW ORLEANS
PFOS1.1x335K

Resources for taking action are available in our community toolkit.

What Louisiana is doing about PFAS

As of April 2026, Louisiana has not adopted state-level PFAS drinking water standards beyond the federal EPA limits finalized in April 2024. The Louisiana Department of Environmental Quality has coordinated federal UCMR 5 sampling and has not published enforceable state MCLs.

Public water systems in Louisiana are subject to the federal compliance timeline requiring initial monitoring by 2027 and treatment installation by 2029.

Based on Louisiana Department of Environmental Quality publications.

All 268 tested water systems in Louisiana

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 268 systems

GradeSystem nameCityWorst compoundvs. EPA limitPopulation
CITY OF VIDALIA WATER SYSTEMVIDALIAPFOA5.0× the federal limit6.4K
VILLAGE OF PARKS WATER SYSTEMPARKSPFOA1.6× the federal limit13K
CITY OF PLAQUEMINE WATER SYSTEMPLAQUEMINEPFOA1.6× the federal limit14K
PARISH UTILITIES OF ASCENSIONDONALDSONVILLEPFOS1.1× the federal limit9.7K
NEW ORLEANS ALGIERS WATER WORKSNEW ORLEANSPFOS1.1× the federal limit53K
PORT SULPHUR WATER DISTRICTBELLE CHASSEPFOS1.1× the federal limit10K
NEW ORLEANS CARROLLTON WWNEW ORLEANSPFOS1.1× the federal limit335K
ST MARY PARISH W&S #2 BAYOU VISTAPATTERSONPFBABelow detection5.4K
CITY OF ABBEVILLE WATER SYSTEMABBEVILLEPFHxSBelow federal limit14K
RAYVILLE WATER SYSTEMRAYVILLEPFHxSBelow federal limit4.8K
SOUTHWEST ALLEN WW DISTRICT NO 2KINDERPFBABelow detection8.1K
ASSUMPTION PARISH WW DISTRICT 1NAPOLEONVILLE6:2FTSBelow detection21K
TOWN OF BENTON WATER SYSTEMBENTONPFBABelow detection8.0K
VILLAGE WATER SYSTEMBENTONPFBSBelow detection11K
TOWN OF GREENWOOD WATER SYSTEMGREENWOODPFBABelow detection5.2K
PINEHILL WATERWORKS DISTRICTSHREVEPORTPFBABelow detection4.9K
SHREVEPORT WATER SYSTEMSHREVEPORTPFBABelow detection192K
MANSFIELD WATER SYSTEMMANSFIELDPFPeABelow detection7.5K
DESOTO PARISH WATER WORKS DISTRICT 1MANSFIELDPFPeABelow detection7.9K
CITY OF JEANERETTE WATER SYSTEMJEANERETTEPFPeABelow detection6.2K
INTRACOASTAL WATER SYSTEM WESTPLAQUEMINEPFBABelow detection6.5K
E JEFFERSON WW DISTRICT 1JEFFERSONPFBABelow detection275K
GRETNA WATERWORKSGRETNAPFBABelow detection17K
W JEFFERSON WW DISTRICT 2JEFFERSONPFBABelow detection140K
LAFOURCHE WATER DISTRICT 1LOCKPORTPFBABelow detection82K
NATCHITOCHES WATER SYSTEMNATCHITOCHESPFHpABelow detection28K
MONROE WATER SYSTEM, LAMONROEPFBABelow detection57K
TOWN & COUNTRY SERVICEMONROEPFBABelow detection5.7K
BELLE CHASSE WATER DISTRICTBELLE CHASSEPFBABelow detection20K
POINTE COUPEE WATER WORKS DISTRICT 1NEW ROADSPFPeABelow detection11K
SOUTH TOLEDO BEND WATER DISTRICTMANYPFBABelow detection5.9K
ST CHARLES PARISH DEPT OF WATERWORKSLULINGPFBABelow detection53K
GRAMERCY WATERWORKSGRAMERCYPFBABelow detection2.9K
LUTCHER WATERWORKSLUTCHERPFBABelow detection4.8K
ST JAMES WATER DISTRICT 2CONVENTPFBABelow detection7.5K
ST JOHN WATER DISTRICT 2LAPLACEPFBABelow detection3.7K
ST JOHN WATER DISTRICT 1LAPLACEPFBABelow detection10K
FRANKLIN WATER SUPPLYFRANKLINPFBABelow detection8.3K
PATTERSON WATER SYSTEMPATTERSONPFBABelow detection8.5K
ST MARY WATER & SEWER COMM #3CENTERVILLEPFBABelow detection7.5K
WATER & SEWER COMMISSION 4 OF ST MARYCHARENTONPFBABelow detection9.7K
TOWN OF BERWICKBERWICKPFBABelow detection5.9K
ST TAM PARISH - CROSS GATES SDCOVINGTON6:2FTSBelow detection7.8K
TENSAS WATER DISTRICT ASSOCIATIONST JOSEPHPFBABelow detection3.8K
HOUMA WATER TREATMENT SERVICE AREAHOUMAPFBABelow detection12K
SCHRIEVER WATER TREATMENT SERVICE AREAHOUMAPFBABelow detection116K
FARMERVILLE WATER SYSTEMFARMERVILLEPFPeABelow detection5.4K
TOWN OF CHURCH POINT WATER SYSTEMCHURCH POINT-Below detection4.2K
CROWLEY WATER SYSTEM (LAWCO)BATON ROUGE-Below detection18K
CITY OF RAYNE WATER SYSTEMRAYNE-Below detection7.7K

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