Drinking water / LA
PFAS in Louisiana drinking water
268 Louisiana public water systems tested under UCMR5. 48 detected at least one PFAS compound; 220 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.
* 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
220 tested systems reported no PFAS above the laboratory reporting limits. Each has its own page with its sampling detail.
- ABITA SPRINGS WATER SYSTEM
- ARCADIA WATER SYSTEM
- ARCHIBALD WATER SYSTEM
- AVOYELLES PARISH WATERWORKS DISTRICT 1
- AVOYELLES WARD ONE WATER SYSTEM INC
- BARKSDALE AFB WATER SYSTEM
- BASTROP WATER SYSTEM
- BATON ROUGE WATER COMPANY
- BAYOU DES CANNES WATER SYSTEM
- BAYOU LIBERTY WATER ASSOCIATION
- BAYOU TECHE WATER WORKS
- BEAU CHENE WATER SYSTEM
- BEAUREGARD DISTRICT NO 2 WARD NO 5
- BEAUREGARD WATER WORKS DIST #3
- BLANCHARD WATER SYSTEM
- BOGUE-LUSA WATER WORKS DISTRICT
- BROUILLETTE WATER SYSTEM INC
- BROWNVILLE WATER SYSTEM
- BUCKEYE WATER DISTRICT 50
- CADEVILLE WATER DISTRICT
- CALCASIEU PARISH WW DIST 9 CARLYSS
- CALCASIEU PARISH WW DISTRICT 7
- CALCASIEU PARISH WW DISTRICT 8
- CALCASIEU PARISH WW DISTRICT NO 1
- CALCASIEU PARISH WW DISTRICT NO 4
- CALCASIEU PARISH WW DISTRICT NO 5
- CALHOUN WATER SYSTEM
- CAMERON PARISH WW DISTRICT 11-SWEET LAKE
- CAMERON PARISH WW DISTRICT 9
- CECILIA WATER CORPORATION
- CHATAIGNIER WATER SYSTEM
- CHENIERE DREW NORTH WATER SYSTEM
- CITY OF ALEXANDRIA WATER SYSTEM
- CITY OF BAKER WATER SYSTEM
- CITY OF BOGALUSA WATER SYSTEM
- CITY OF BOSSIER CITY WATER SYSTEM
- CITY OF BREAUX BRIDGE WATER SYSTEM
- CITY OF BROUSSARD WATER SYSTEM
- CITY OF CARENCRO WATER SYSTEM
- CITY OF DENHAM SPRINGS WATER SYSTEM
- CITY OF DERIDDER WATER SYSTEM
- CITY OF GONZALES WATER SYSTEM
- CITY OF HAMMOND WATER SYSTEM
- CITY OF JENNINGS WATER SYSTEM
- CITY OF KAPLAN WATER SYSTEM
- CITY OF LAKE CHARLES WATER SYSTEM
- CITY OF LEESVILLE WATER SYSTEM
- CITY OF MARKSVILLE WATER SYSTEM
- CITY OF OAKDALE WATER SYSTEM
- CITY OF OPELOUSAS WATER SYSTEM
- CITY OF PINEVILLE WATER SYSTEM
- CITY OF RAYNE WATER SYSTEM
- CITY OF SCOTT WATER SYSTEM
- CITY OF ST MARTINVILLE WATER SYSTEM
- CITY OF VILLE PLATTE WATER SYSTEM
- CITY OF WINNFIELD WATER SYSTEM
- CITY OF YOUNGSVILLE PURCHASE WS
- CONCORDIA WATERWORKS DISTRICT 1
- CONSOLIDATED WATERWORKS DISTRICT 2
- COUSHATTA WATER SYSTEM
- COVINGTON WATER SUPPLY
- CROWLEY WATER SYSTEM (LAWCO)
- CULBERTSON WATER SYSTEM
- CYPRESS BLACK BAYOU WATER SYSTEM
- DELHI WATER SUPPLY
- DELTECH CORPORATION
- DEQUINCY WATER SYSTEM (LAWCO)
- DOW USA, LA DIVISION
- DOYLINE WATERWORKS DISTRICT 1
- DUBACH WATER SYSTEM
- EAST CARROLL WS SOUTH
- EAST CENTRAL VERNON WATER SYSTEM
- EAST FELICIANA RURAL GURLEY RD WS
- EAST SIDE WATER SYSTEM
- EBARB WWKS DIST # 1 - AIMWELL AREA
- EGAN WATER CORPORATION
- EUNICE WATER SYSTEM (LAWCO)
- FAIRVIEW UNION WATER SYSTEM
- FALSE RIVER WATER COMPANY
- FIFTH WARD WATER SYSTEM
- FOLSOM WATER SUPPLY
- FOREST HILL UTILITIES
- FORT POLK NORTH WATER SYSTEM
- FORT POLK SOUTH WATER SYSTEM
- FSWC - HAMMOND HEIGHTS
- GARDNER COMMUNITY WATER SYSTEM
- GILLIS LONG CENTER
- GOWC East
- GOWC NORTH WATER SYSTEM
- GRAMBLING STATE UNIVERSITY WS
- GRAMBLING WATER SYSTEM
- GREATER WARD 1 WATERWORKS DISTRICT
- GREENSBURG WATER SYSTEM
- HENDERSON NINA WATER SYSTEM INC
- HOMER WATER SYSTEM, LA
- HOUSTON RIVER WATERWORKS DISTRICT 11
- IBERIA WATER WORKS DISTRICT 3 - COTEAU
- IBERVILLE WATERWORKS DISTRICT #2
- JEFF DAVIS CENTRAL WATERWORKS DISTRICT
- JEFF DAVIS WATER AND SEWER COMMISSION 1
- JEFF DAVIS WATER DISTRICT 4
- JONESBORO WATER SYSTEM, LA
- KEATCHIE WATER SYSTEM
- KIROLI DARBONNE WS
- KOLIN RUBY WISE WATERWORK DISTRICT 11 A
- LAFAYETTE UTILITIES WATER SYSTEM
- LAKE PROVIDENCE WATER SYSTEM
- LAWTELL WATER WORKS DISTRICT NO 1
- LEE ROAD WATER CORPORATION
- LENA WATER SYSTEM INC
- LEWISBURG BELLEVUE WATER SYSTEM
- LOUISIANA STATE PENITENTIARY
- LPWD NORTH PRODUCTION FACILITY
- LPWD SOUTH
- LPWDN NORTH REGION
- MAGNOLIA PLANTATION WATER SYSTEM INC
- MAGNOLIA WATER UTILITIES - EDEN ISLES
- MAGNOLIA WATER UTILITIES - GREENLEAVES
- MAGNOLIA WATER UTILITIES - THE MEADOWS
- MANDEVILLE WATER SUPPLY
- MILTON PURCHASE WATER SYSTEM
- MINDEN WATER SYSTEM
- MIRE BRANCH WATER CORPORATION
- MONTEREY RURAL WATER SYSTEM INC
- MORGAN CITY WATER SYSTEM, LA
- NATCHITOCHES PARISH WWKS DISTRICT 2
- NEW CARROLL WATER SYSTEM
- NEW IBERIA WATER SYSTEM (LAWCO)
- NEW LLANO WATER DEPARTMENT
- NEW ROADS WATER SYSTEM
- NORTH DESOTO WATER SYSTEM
- NORTH FRANKLIN WATER WORKS
- NORTH IBERVILLE WATER SYSTEM
- NORTH OF CROWLEY WATER CORPORATION
- PLAISANCE WATER SYSTEM
- PLEASANT VALLEY WATER SYSTEM
- POLLOCK AREA WATER SYSTEM INC
- PONTCHATOULA WATER SYSTEM
- PORT ALLEN WATER SYSTEM
- PRAIRIE RONDE WATER SYSTEM INC
- RAPIDES ISLAND WATER ASSOCIATION INC
- RAPIDES PARISH WATERWORKS DISTRICT 3
- RESOLVE WHISPERWOOD ESTATES SD WS
- RURAL FRANKLINTON WATER
- RUSTON WATER SYSTEM
- SABINE PARISH WATER DISTRICT 1
- SAVOY SWORDS WATER SYSTEM INC
- SLIDELL WATER SUPPLY
- SOUTH CLAIBORNE WATER SYSTEM
- SOUTH GRANT WATER CORPORATION
- SOUTH MONROE WS GOWC
- SOUTH RAYNE WATER CORPORATION
- SOUTH VERNON PARISH WATERWORKS DISTRICT
- SOUTHEAST WATERWORKS DISTRICT 2
- SOUTHWEST OUACHITA WATERWORKS, INC
- SPRINGHILL WATER SYSTEM
- ST BERNARD PARISH WATERWORKS
- ST JAMES WATER DISTRICT 1
- ST JOHN WATER DISTRICT 3
- ST LANDRY WATER WORKS DISTRICT 2 RURAL
- ST TAM PARISH - BRIARWOOD TERRACE
- ST TAM PARISH-FAUBOURG-COQUILLE
- ST TAMMANY WATER DIST 2
- SULPHUR CITY OF WATER SYSTEM
- SUMMERVILLE WATER SYSTEM
- TALLULAH WATER SYSTEM
- TANGIPAHOA (SECOND WARD) WATER DISTRICT
- TANGIPAHOA PARISH WATER DISTRICT
- TESI OSSUN HEIGHTS
- THIBODAUX WATERWORKS
- TOWN OF ALBANY WATER SYSTEM
- TOWN OF AMITE WATER SYSTEM
- TOWN OF ARNAUDVILLE WATER SYSTEM
- TOWN OF BUNKIE WATER SYSTEM
- TOWN OF CHURCH POINT WATER SYSTEM
- TOWN OF ERATH WATER SYSTEM
- TOWN OF FERRIDAY WATER SYSTEM
- TOWN OF FRANKLINTON WATER SYSTEM
- TOWN OF HAUGHTON WATER SYSTEM
- TOWN OF IOWA WATER SYSTEM
- TOWN OF JENA WATER SYSTEM
- TOWN OF LAKE ARTHUR WATER SYSTEM
- TOWN OF LEONVILLE WATER SYSTEM
- TOWN OF LIVINGSTON WATER SYSTEM
- TOWN OF MAMOU WATER SYSTEM
- TOWN OF MARINGOUIN
- TOWN OF PEARL RIVER
- TOWN OF PLAUCHEVILLE WATER SYSTM
- TOWN OF PORT BARRE WATER SYSTEM
- TOWN OF SUNSET WATER SYSTEM
- TOWN OF VINTON WATER SYSTEM
- TOWN OF WELSH WATER SYSTEM
- TOWN OF WOODWORTH WATER SYSTEM
- UNITED WATER SYSTEM
- UTILITIES INC - KINGSPOINT SUBDIVISION
- UTILITIES INC - NORTH PARK WATER SUPPLY
- VARNADO WATER WORKS
- VARNADO WATER WORKS - PINE
- VERMILION WATERWORKS DISTRICT 1
- VERNON PARISH WATER AND SEWER COMMISSION
- VILLAGE OF TURKEY CREEK WATER SYSTEM
- VIVIAN WATER SYSTEM
- WALKER WATER SYSTEM
- WARD II WATER DISTRICT
- WATERWORKS DISTRICT 7
- WBR DISTRICT 4 -SECTION ROAD WINTERVILLE
- WBR PUBLIC UTILITIES
- WESLEY CHAPEL WATER SYSTEM
- WEST BATON ROUGE WATER WORKS DISTRICT 2
- WEST FELICIANA CONSOL WWKS DISTRICT 13
- WEST GRANT WATER ASSOCIATION
- WEST HWY 80 ARK ROAD WS
- WEST MONROE WATER SYSTEM
- WEST VERNON PARISH WATERWORKS DISTRICT
- WESTLAKE CITY OF WATER SYSTEM
- WESTVIEW WATER WORKS
- WESTWEGO WATERWORKS
- WINNSBORO WATER SYSTEM
- WWKS DISTRICT 2 OF ST HELENA
- ZACHARY WATER SYSTEM
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