Louisiana Tap Water Quality: Is It Safe to Drink?

2026 EPA water quality data for 150 community water systems serving 862,711+ people in Louisiana. Find your water system to see violations, PFAS results, lead testing, and a safety grade — free.

Louisiana sources drinking water from both the Mississippi River alluvial aquifer and surface water intakes. Disinfection byproduct formation is a particular challenge due to high organic matter in warm southern surface waters. Saltwater intrusion threatens aquifers in coastal parishes as land subsidence continues.

Find Your Water System in Louisiana

Enter your ZIP code to see EPA violations, lead test results, PFAS data, and a safety grade for your water.

📊 Data from EPA’s SDWIS · 🔄 Updated quarterly · 🏛️ 150+ water systems in Louisiana

SHREVEPORT WATER SYSTEM SHREVEPORT, LA · 192,378 people · Surface Water CITY OF LAKE CHARLES WATER SYSTEM LAKE CHARLES, LA · 79,500 people · Groundwater CITY OF BOSSIER CITY WATER SYSTEM BOSSIER CITY, LA · 78,960 people · Surface Water SULPHUR CITY OF WATER SYSTEM SULPHUR, LA · 24,489 people · Groundwater BEAUREGARD WATER WORKS DIST #3 LONGVILLE, LA · 24,000 people · Groundwater ASSUMPTION PARISH WW DISTRICT 1 NAPOLEONVILLE, LA · 21,366 people · Surface Water CALCASIEU PARISH WW DISTRICT NO 1 LAKE CHARLES, LA · 20,837 people · Groundwater CROWLEY WATER SYSTEM (LAWCO) BATON ROUGE, LA · 17,733 people · Groundwater CITY OF GONZALES WATER SYSTEM GONZALES, LA · 16,806 people · Groundwater BLANCHARD WATER SYSTEM BLANCHARD, LA · 16,326 people · Surface Water CALCASIEU PARISH WW DIST 9 CARLYSS SULPHUR, LA · 14,502 people · Groundwater CITY OF DERIDDER WATER SYSTEM DERIDDER, LA · 14,400 people · Groundwater BARKSDALE AFB WATER SYSTEM BARKSDALE AFB, LA · 13,000 people · Surface Water Purchased VILLAGE WATER SYSTEM BENTON, LA · 10,890 people · Groundwater PARISH UTILITIES OF ASCENSION DONALDSONVILLE, LA · 9,732 people · Surface Water MIRE BRANCH WATER CORPORATION CHURCH POINT, LA · 9,480 people · Groundwater SOUTHWEST ALLEN WW DISTRICT NO 2 KINDER, LA · 8,106 people · Groundwater TOWN OF BENTON WATER SYSTEM BENTON, LA · 8,037 people · Surface Water Purchased CITY OF RAYNE WATER SYSTEM RAYNE, LA · 7,722 people · Groundwater CITY OF MARKSVILLE WATER SYSTEM MARKSVILLE, LA · 7,593 people · Groundwater Purchased HOUSTON RIVER WATERWORKS DISTRICT 11 SULPHUR, LA · 6,915 people · Groundwater CALCASIEU PARISH WW DISTRICT 8 LAKE CHARLES, LA · 6,834 people · Groundwater BEAUREGARD DISTRICT NO 2 WARD NO 5 SINGER, LA · 6,613 people · Groundwater CITY OF OAKDALE WATER SYSTEM OAKDALE, LA · 6,114 people · Groundwater WATERWORKS DISTRICT 7 KEITHVILLE, LA · 5,817 people · Groundwater FIFTH WARD WATER SYSTEM MARKSVILLE, LA · 5,676 people · Groundwater CYPRESS BLACK BAYOU WATER SYSTEM BENTON, LA · 5,520 people · Surface Water Purchased CALCASIEU PARISH WW DISTRICT NO 5 LAKE CHARLES, LA · 5,388 people · Groundwater DEQUINCY WATER SYSTEM (LAWCO) BATON ROUGE, LA · 5,370 people · Groundwater EGAN WATER CORPORATION EGAN, LA · 5,358 people · Groundwater TOWN OF HAUGHTON WATER SYSTEM HAUGHTON, LA · 5,355 people · Groundwater CALCASIEU PARISH WW DISTRICT NO 4 WESTLAKE, LA · 5,340 people · Groundwater TOWN OF GREENWOOD WATER SYSTEM GREENWOOD, LA · 5,205 people · Surface Water TOWN OF BUNKIE WATER SYSTEM BUNKIE, LA · 5,169 people · Groundwater PINEHILL WATERWORKS DISTRICT SHREVEPORT, LA · 4,926 people · Surface Water Purchased WESTLAKE CITY OF WATER SYSTEM WESTLAKE, LA · 4,858 people · Groundwater CALCASIEU PARISH WW DISTRICT 7 DEQUINCY, LA · 4,791 people · Groundwater SOUTH RAYNE WATER CORPORATION RAYNE, LA · 4,254 people · Groundwater TOWN OF PLAUCHEVILLE WATER SYSTEM PLAUCHEVILLE, LA · 4,233 people · Groundwater TOWN OF CHURCH POINT WATER SYSTEM CHURCH POINT, LA · 4,176 people · Groundwater ARCADIA WATER SYSTEM ARCADIA, LA · 4,146 people · Groundwater TOWN OF VINTON WATER SYSTEM VINTON, LA · 4,101 people · Groundwater VIVIAN WATER SYSTEM VIVIAN, LA · 4,050 people · Surface Water NORTH OF CROWLEY WATER CORPORATION RAYNE, LA · 4,020 people · Groundwater AVOYELLES PARISH WATERWORKS DISTRICT 1 BORDELONVILLE, LA · 3,900 people · Groundwater BROUILLETTE WATER SYSTEM INC MARKSVILLE, LA · 3,732 people · Groundwater AVOYELLES WARD ONE WATER SYSTEM INC EFFIE, LA · 3,726 people · Groundwater TOWN OF IOWA WATER SYSTEM IOWA, LA · 3,636 people · Groundwater WEST ALLEN PARISH WATER SYSTEM REEVES, LA · 3,582 people · Groundwater VILLAGE OF HESSMER WATER SYSTEM HESSMER, LA · 3,246 people · Groundwater CONSOLIDATED WWKS DISTRICT 1 OF BOSSIER BENTON, LA · 3,210 people · Groundwater TOWN OF KINDER WATER SYSTEM KINDER, LA · 3,195 people · Groundwater Purchased CALCASIEU WW #14 WARD 5 STARKS, LA · 3,150 people · Groundwater TOWN OF COTTONPORT WATER SYSTEM COTTONPORT, LA · 3,120 people · Groundwater HEBERT WATER SYSTEM COLUMBIA, LA · 3,048 people · Groundwater EAST ALLEN PARISH WATER WORKS OBERLIN, LA · 3,030 people · Groundwater SLIGO WATER SYSTEM INCORPORATED COUSHATTA, LA · 2,850 people · Groundwater EGAN WATER CORPORATION NO 2 EGAN, LA · 2,835 people · Groundwater EAST COLUMBIA WATER SYSTEM COLUMBIA, LA · 2,829 people · Groundwater TOWN OF OBERLIN WATER SYSTEM OBERLIN, LA · 2,730 people · Groundwater AVOYELLES WARD 3 WATERWORKS DISTRICT MANSURA, LA · 2,619 people · Groundwater Purchased TOWN OF PLAIN DEALING WATER SYSTEM PLAIN DEALING, LA · 2,346 people · Groundwater DOGWOOD SOUTH WATER SYSTEM BENTON, LA · 2,304 people · Groundwater RINGGOLD WATER SYSTEM RINGGOLD, LA · 2,283 people · Groundwater ASCENSION CONSOLIDATED UTILITY DIST 1 DONALDSONVILLE, LA · 2,229 people · Surface Water Purchased TOWN OF EVERGREEN WATER SYSTEM EVERGREEN, LA · 2,205 people · Groundwater OIL CITY WATER WORKS OIL CITY, LA · 2,148 people · Surface Water Purchased TOWN OF SIMMESPORT WATER SYSTEM SIMMESPORT, LA · 2,142 people · Groundwater GULF STREAM MANOR WATER SYSTEM LAKE CHARLES, LA · 2,130 people · Groundwater CALCASIEU PARISH WW 12 WARD 3 LAKE CHARLES, LA · 2,130 people · Groundwater LAKEVIEW WATER SYSTEM SHREVEPORT, LA · 2,025 people · Surface Water Purchased MAGNOLIA - EAGLE DES PERES, MO · 1,980 people · Groundwater COLUMBIA HEIGHTS WATER DISTRICT COLUMBIA, LA · 1,965 people · Groundwater LAWCO MANSURA BATON ROUGE, LA · 1,878 people · Groundwater Purchased ALBERTA WATER SYSTEM CASTOR, LA · 1,860 people · Groundwater TOWN OF IOTA WATER SYSTEM IOTA, LA · 1,842 people · Groundwater WEST CENTRAL BOSSIER WATER SYSTEM BENTON, LA · 1,771 people · Groundwater NORTHWEST ALLEN PARISH WW DISTRICT GRANT, LA · 1,761 people · Groundwater SOUTH BOSSIER WATER SYSTEM ELM GROVE, LA · 1,755 people · Groundwater VILLAGE OF MOREAUVILLE WATER SYSTEM MOUREAUVILLE, LA · 1,725 people · Groundwater Purchased MAGNOLIA-GREEN ACRES SUBDIVISION DES PERES, MO · 1,575 people · Groundwater GRAYSON WATER SYSTEM GRAYSON, LA · 1,461 people · Groundwater SOUTH OAKDALE WATER SYSTEM OAKDALE, LA · 1,434 people · Groundwater ASCENSION PARISH WATER WORKS DISTRICT 2 BATON ROUGE, LA · 1,353 people · Groundwater Purchased BELLEVUE WATER SYSTEM DOYLINE, LA · 1,347 people · Groundwater KELLY WATER DISTRICT KELLY, LA · 1,314 people · Groundwater ALLEN PARISH WW DISTRICT NO 1 OAKDALE, LA · 1,266 people · Groundwater HOLUM WATER SYSTEM GRAYSON, LA · 1,230 people · Groundwater CYPRESS WATER SYSTEM RINGGOLD, LA · 1,125 people · Groundwater QUAIL RIDGE ESTATES WATER SYSTEM LAKE CHARLES, LA · 1,119 people · Groundwater TOWN OF MERRYVILLE WATER SYSTEM MERRYVILLE, LA · 1,107 people · Groundwater SOUTHWEST AVOYELLES WATER DISTRICT BUNKIE, LA · 1,053 people · Groundwater WARDS 4 & 5 WATER SYSTEM GRAYSON, LA · 1,002 people · Groundwater MOORINGSPORT WATER SYSTEM MOORINGSPORT, LA · 999 people · Surface Water Purchased BEAUREGARD WATERWORKS DISTRICT NO. 6 MERRYVILLE, LA · 993 people · Groundwater GIBSLAND WATER SYSTEM GIBSLAND, LA · 979 people · Groundwater TOWN OF ELIZABETH WATER SYSTEM ELIZABETH, LA · 966 people · Groundwater ALABAMA WATER SYSTEM ARCADIA, LA · 948 people · Groundwater COLUMBIA WATER SYSTEM COLUMBIA, LA · 945 people · Groundwater WATERWORKS DIST. NO. 10 OF WARD 7 VINTON, LA · 942 people · Groundwater Purchased COUNTRY PINES NORTH SUBDIVISION WS MANDEVILLE, LA · 936 people · Groundwater CLARKS WATER SYSTEM CLARKS, LA · 906 people · Groundwater VILLAGE OF ESTHERWOOD WATER SYSTEM ESTHERWOOD, LA · 891 people · Groundwater EAST CENTRAL BOSSIER WATER SYSTEM BENTON, LA · 885 people · Groundwater VILLAGE OF MORSE WATER SYSTEM MORSE, LA · 806 people · Groundwater SPRING BAYOU WATER WORKS DISTRICT MARKSVILLE, LA · 795 people · Groundwater Purchased COTTON PLANT WATER SYSTEM GRAYSON, LA · 783 people · Groundwater VILLAGE OF MERMENTAU WATER SYSTEM MERMENTAU, LA · 780 people · Groundwater FRIENDSHIP WATER SYSTEM SALINE, LA · 777 people · Groundwater VILLAGE OF HOSSTON WATER SYSTEM HOSSTON, LA · 729 people · Groundwater BEAUREGARD WATER DISTRICT #5 MERRYVILLE, LA · 672 people · Groundwater FAIRVIEW MOBILE ESTATES NORTH WS PRAIRIEVILLE, LA · 669 people · Groundwater MOSSVILLE WW DISTRICT NO 2 LAKE CHARLES, LA · 660 people · Groundwater Purchased DEEPWOODS UTILITIES INC KEITHVILLE, LA · 657 people · Groundwater MAGNOLIA-LAKE STREET DES PERES, MO · 651 people · Groundwater MT OLIVE WATER SYSTEM QUITMAN, LA · 645 people · Groundwater GLEN LEAF MOBILE HOME COMMUNITY SHREVEPORT, LA · 645 people · Surface Water Purchased PINECREST MOBILE HOME VILLAGE SHREVEPORT, LA · 639 people · Surface Water Purchased FOUR FORKS WATER SYSTEM KEITHVILLE, LA · 609 people · Groundwater MAGNOLIA-DIXIE GARDEN DES PERES, MO · 570 people · Surface Water Purchased COUNTRY PINES SOUTH SUBDIVISION WS MANDEVILLE, LA · 570 people · Groundwater THE CHARLESTON MHC WATER SYSTEM HAMMOND, LA · 567 people · Groundwater MAGNOLIA-WILDWOOD SOUTH DES PERES, MO · 549 people · Surface Water Purchased NORTHWEST WATERWORKS LIN PARK BATON ROUGE, LA · 513 people · Surface Water Purchased JAMESTOWN FRYEBURG WATER SYSTEM DUBBERLY, LA · 495 people · Groundwater IDA WATER SYSTEM IDA, LA · 495 people · Groundwater GARDEN HEIGHTS WATER SYSTEM LAKE CHARLES, LA · 465 people · Groundwater DIVERSION WATER - BAYOU ESTATES PRAIRIEVILLE, LA · 450 people · Groundwater SMITH MOBILE HOME VILLAGE WATER SYSTEM BROOKLYN, NY · 444 people · Groundwater CASTOR WATER SYSTEM CASTOR, LA · 435 people · Groundwater SALINE WATER SYSTEM SALINE, LA · 429 people · Groundwater NORTHWEST WATERWORKS LAKEWOOD VILLAGE BATON ROUGE, LA · 423 people · Surface Water Purchased THE SALLIER MHC WATER SYSTEM HAMMOND, LA · 400 people · Groundwater CYPRESS VILLAGE MHP WATER SYSTEM BATON ROUGE, LA · 396 people · Groundwater Purchased OLD SALINE COMMUNITY WATER SYSTEM CASTOR, LA · 390 people · Groundwater FAIRVIEW MOBILE ESTATES SOUTH WS PRAIRIEVILLE, LA · 378 people · Groundwater BIENVILLE WATER SYSTEM BIENVILLE, LA · 360 people · Groundwater SOUTHEAST BIENVILLE WATER SYSTEM SALINE, LA · 348 people · Groundwater BRYCELAND WATER SYSTEM BRYCELAND, LA · 342 people · Groundwater BELLA VISTA MHP WATER SYSTEM SHREVEPORT, LA · 330 people · Groundwater TAYLOR WATER SYSTEM MANDEVILLE, LA · 318 people · Groundwater OAK MEADOWS SUBDIVISION WATER SYSTEM LAKE CHARLES, LA · 318 people · Groundwater LUCKY WATERWORKS BIENVILLE, LA · 315 people · Groundwater RODESSA WATER SYSTEM RODESSA, LA · 312 people · Groundwater HILLSIDE MOBILE HOME PARK SHREVEPORT, LA · 309 people · Surface Water Purchased STONEGATE MANUFACTURED HOME COMMUNITY SHREVEPORT, LA · 309 people · Surface Water Purchased MAGNOLIA-UTILITY SERVICE OF LAKE CHARLES DES PERES, MO · 306 people · Groundwater ST MARYS WATER SYSTEM PLAIN DEALING, LA · 294 people · Groundwater MAGNOLIA-BRIGAS ESTATES DES PERES, MO · 294 people · Groundwater HUNTINGTON MOBILE HOME PARK WATER SYSTEM SHREVEPORT, LA · 291 people · Surface Water Purchased