Systems reaching a study comparison level
0.0%0 of 238 active community water systems with complete monitoring
All 238 systems had complete monitoring. 0 reached at least one study comparison level; 238 did not. “Study comparison level” means the dated EPA technical cutoff used in this January 2026 research release. It does not determine household exposure, health risk, or current legal compliance.
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ZIP codes are used only to route visitors to public water systems that reported serving them. Confirm the actual provider using a water bill or utility record.
Compound summary
System counts in Louisiana
Each count shows how many included water systems reached the named study level.
| Study comparison | Systems reaching level | Water systems included | Percent |
|---|---|---|---|
| PFOA: study level 4.05 ppt (April 2024 EPA level: 4 ppt) | 0 | 238 | 0.0% |
| PFOS: study level 4.05 ppt (April 2024 EPA level: 4 ppt) | 0 | 238 | 0.0% |
| PFHxS: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 238 | 0.0% |
| PFNA: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 238 | 0.0% |
| HFPO-DA: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 238 | 0.0% |
| Hazard Index: study level 1.5 with at least two detected components (April 2024 EPA level: 1) | 0 | 238 | 0.0% |
System directory
Community water systems with complete monitoring
Each PWSID appears once, preventing double counting across ZIP associations.
| Public water system | PWSID | Population served | Primary source | Sampling locations | Study comparison |
|---|---|---|---|---|---|
| ABITA SPRINGS WATER SYSTEM | LA1103002 | 3,693 | Ground water | 2 | Below the study levels |
| ARCADIA WATER SYSTEM | LA1013003 | 4,146 | Ground water | 1 | Below the study levels |
| ARCHIBALD WATER SYSTEM | LA1083012 | 4,200 | Ground water | 2 | Below the study levels |
| ASSUMPTION PARISH WW DISTRICT 1 | LA1007001 | 21,366 | Surface water | 1 | Below the study levels |
| AVOYELLES PARISH WATERWORKS DISTRICT 1 | LA1009002 | 3,900 | Ground water | 1 | Below the study levels |
| AVOYELLES WARD ONE WATER SYSTEM INC | LA1009016 | 3,726 | Ground water | 1 | Below the study levels |
| BARKSDALE AFB WATER SYSTEM | LA1015022 | 13,000 | Surface water purchased | 1 | Below the study levels |
| BASTROP WATER SYSTEM | LA1067003 | 18,105 | Ground water | 2 | Below the study levels |
| BATON ROUGE WATER COMPANY | LA1033005 | 596,844 | Ground water | 41 | Below the study levels |
| BAYOU DES CANNES WATER SYSTEM | LA1039016 | 4,578 | Ground water | 1 | Below the study levels |
| BAYOU LIBERTY WATER ASSOCIATION | LA1103005 | 10,791 | Ground water | 2 | Below the study levels |
| BAYOU TECHE WATER WORKS | LA1099002 | 10,137 | Ground water | 1 | Below the study levels |
| BEAU CHENE WATER SYSTEM | LA1103006 | 4,650 | Ground water | 2 | Below the study levels |
| BEAUREGARD DISTRICT NO 2 WARD NO 5 | LA1011012 | 6,613 | Ground water | 2 | Below the study levels |
| BEAUREGARD WATER WORKS DIST #3 | LA1011008 | 24,000 | Ground water | 6 | Below the study levels |
| BELLE CHASSE WATER DISTRICT | LA1075001 | 19,644 | Surface water | 1 | Below the study levels |
| BLANCHARD WATER SYSTEM | LA1017006 | 16,326 | Surface water | 1 | Below the study levels |
| BROUILLETTE WATER SYSTEM INC | LA1009003 | 3,732 | Ground water | 1 | Below the study levels |
| BROWNVILLE WATER SYSTEM | LA1073004 | 9,696 | Ground water | 3 | Below the study levels |
| BUCKEYE WATER DISTRICT 50 | LA1079004 | 12,078 | Ground water | 2 | Below the study levels |
| CADEVILLE WATER DISTRICT | LA1073060 | 6,219 | Ground water | 4 | Below the study levels |
| CALCASIEU PARISH WW DIST 9 CARLYSS | LA1019116 | 14,502 | Ground water | 1 | Below the study levels |
| CALCASIEU PARISH WW DISTRICT 7 | LA1019114 | 4,791 | Ground water | 1 | Below the study levels |
| CALCASIEU PARISH WW DISTRICT 8 | LA1019118 | 6,834 | Ground water | 2 | Below the study levels |
| CALCASIEU PARISH WW DISTRICT NO 1 | LA1019051 | 20,837 | Ground water | 2 | Below the study levels |
| CALCASIEU PARISH WW DISTRICT NO 4 | LA1019053 | 5,340 | Ground water | 1 | Below the study levels |
| CALCASIEU PARISH WW DISTRICT NO 5 | LA1019084 | 5,088 | Ground water | 1 | Below the study levels |
| CAMERON PARISH WW DISTRICT 11-SWEET LAKE | LA1023011 | 3,507 | Ground water | 2 | Below the study levels |
| CAMERON PARISH WW DISTRICT 9 | LA1023012 | 871 | Ground water | 4 | Below the study levels |
| CECILIA WATER CORPORATION | LA1099005 | 12,420 | Ground water | 1 | Below the study levels |
| CHENIERE DREW NORTH WATER SYSTEM | LA1073100 | 11,280 | Ground water | 5 | Below the study levels |
| CITY OF ABBEVILLE WATER SYSTEM | LA1113001 | 14,217 | Ground water | 1 | Below the study levels |
| CITY OF ALEXANDRIA WATER SYSTEM | LA1079001 | 66,798 | Ground water | 9 | Below the study levels |
| CITY OF BAKER WATER SYSTEM | LA1033003 | 13,855 | Ground water | 4 | Below the study levels |
| CITY OF BOSSIER CITY WATER SYSTEM | LA1015004 | 79,506 | Surface water | 1 | Below the study levels |
| CITY OF BREAUX BRIDGE WATER SYSTEM | LA1099003 | 10,098 | Ground water | 1 | Below the study levels |
| CITY OF BROUSSARD WATER SYSTEM | LA1055003 | 5,151 | Ground water | 1 | Below the study levels |
| CITY OF CARENCRO WATER SYSTEM | LA1055005 | 11,301 | Ground water | 2 | Below the study levels |
| CITY OF DENHAM SPRINGS WATER SYSTEM | LA1063004 | 25,725 | Ground water | 5 | Below the study levels |
| CITY OF DERIDDER WATER SYSTEM | LA1011001 | 14,400 | Ground water | 4 | Below the study levels |
| CITY OF GONZALES WATER SYSTEM | LA1005030 | 16,806 | Ground water | 3 | Below the study levels |
| CITY OF HAMMOND WATER SYSTEM | LA1105009 | 21,135 | Ground water | 5 | Below the study levels |
| CITY OF JEANERETTE WATER SYSTEM | LA1045004 | 6,189 | Ground water | 1 | Below the study levels |
| CITY OF JENNINGS WATER SYSTEM | LA1053003 | 9,837 | Ground water | 1 | Below the study levels |
| CITY OF KAPLAN WATER SYSTEM | LA1113009 | 4,340 | Ground water | 1 | Below the study levels |
| CITY OF LAKE CHARLES WATER SYSTEM | LA1019029 | 79,500 | Ground water | 6 | Below the study levels |
| CITY OF MANY WATER SYSTEM | LA1085016 | 4,428 | Surface water | 3 | Below the study levels |
| CITY OF MARKSVILLE WATER SYSTEM | LA1009011 | 7,593 | Ground water purchased | 1 | Below the study levels |
| CITY OF OAKDALE WATER SYSTEM | LA1003006 | 6,114 | Ground water | 1 | Below the study levels |
| CITY OF OPELOUSAS WATER SYSTEM | LA1097010 | 20,388 | Ground water | 2 | Below the study levels |
| CITY OF PLAQUEMINE WATER SYSTEM | LA1047005 | 14,043 | Ground water | 2 | Below the study levels |
| CITY OF RAYNE WATER SYSTEM | LA1001007 | 10,908 | Ground water | 1 | Below the study levels |
| CITY OF SCOTT WATER SYSTEM | LA1055026 | 9,696 | Ground water purchased | 1 | Below the study levels |
| CITY OF ST MARTINVILLE WATER SYSTEM | LA1099007 | 7,263 | Ground water | 1 | Below the study levels |
| CITY OF VILLE PLATTE WATER SYSTEM | LA1039010 | 6,590 | Ground water | 5 | Below the study levels |
| CITY OF WINNFIELD WATER SYSTEM | LA1127012 | 7,194 | Ground water | 1 | Below the study levels |
| CITY OF YOUNGSVILLE PURCHASE WS | LA1055195 | 7,623 | Ground water purchased | 2 | Below the study levels |
| CONCORDIA WATERWORKS DISTRICT 1 | LA1029003 | 6,921 | Ground water | 1 | Below the study levels |
| CONSOLIDATED WATERWORKS DISTRICT 2 | LA1067012 | 3,498 | Ground water | 2 | Below the study levels |
| COUSHATTA WATER SYSTEM | LA1081001 | 3,300 | Ground water | 1 | Below the study levels |
| COVINGTON WATER SUPPLY | LA1103011 | 16,185 | Ground water | 3 | Below the study levels |
| CROWLEY WATER SYSTEM (LAWCO) | LA1001002 | 17,733 | Ground water | 1 | Below the study levels |
| CULBERTSON WATER SYSTEM | LA1061024 | 3,300 | Ground water | 3 | Below the study levels |
| CYPRESS BLACK BAYOU WATER SYSTEM | LA1015040 | 5,520 | Surface water purchased | 1 | Below the study levels |
| DELHI WATER SUPPLY | LA1083002 | 4,071 | Ground water | 1 | Below the study levels |
| DEQUINCY WATER SYSTEM (LAWCO) | LA1019008 | 5,370 | Ground water | 2 | Below the study levels |
| DUBACH WATER SYSTEM | LA1061003 | 1,218 | Ground water | 2 | Below the study levels |
| E JEFFERSON WW DISTRICT 1 | LA1051001 | 275,163 | Surface water | 3 | Below the study levels |
| EAST CENTRAL VERNON WATER SYSTEM | LA1115117 | 6,363 | Ground water | 4 | Below the study levels |
| EAST FELICIANA RURAL GURLEY RD WS | LA1037004 | 14,829 | Ground water | 1 | Below the study levels |
| EAST SIDE WATER SYSTEM | LA1039003 | 5,640 | Ground water | 2 | Below the study levels |
| EBARB WWKS DIST # 1 - AIMWELL AREA | LA1085059 | 6,738 | Ground water purchased | 1 | Below the study levels |
| EGAN WATER CORPORATION | LA1001025 | 5,337 | Ground water | 1 | Below the study levels |
| EUNICE WATER SYSTEM (LAWCO) | LA1097022 | 15,393 | Ground water | 2 | Below the study levels |
| FARMERVILLE WATER SYSTEM | LA1111005 | 5,352 | Ground water | 3 | Below the study levels |
| FIFTH WARD WATER SYSTEM | LA1009007 | 5,676 | Ground water | 1 | Below the study levels |
| FOLSOM WATER SUPPLY | LA1103014 | 1,992 | Ground water | 3 | Below the study levels |
| FOREST HILL UTILITIES | LA1079009 | 3,600 | Ground water | 1 | Below the study levels |
| FORT POLK NORTH WATER SYSTEM | LA1115064 | 9,420 | Ground water | 1 | Below the study levels |
| FORT POLK SOUTH WATER SYSTEM | LA1115065 | 10,902 | Ground water | 2 | Below the study levels |
| FSWC - HAMMOND HEIGHTS | LA1105010 | 4,281 | Ground water | 4 | Below the study levels |
| GARDNER COMMUNITY WATER SYSTEM | LA1079010 | 4,566 | Ground water | 3 | Below the study levels |
| GOWC East | LA1073121 | 11,742 | Ground water | 2 | Below the study levels |
| GOWC NORTH WATER SYSTEM | LA1073120 | 13,287 | Ground water | 4 | Below the study levels |
| GRAMBLING WATER SYSTEM | LA1061006 | 4,949 | Ground water | 3 | Below the study levels |
| GRAMERCY WATERWORKS | LA1093002 | 2,860 | Surface water | 1 | Below the study levels |
| GREATER WARD 1 WATERWORKS DISTRICT | LA1061007 | 3,333 | Ground water | 2 | Below the study levels |
| GRETNA WATERWORKS | LA1051003 | 17,026 | Surface water | 1 | Below the study levels |
| HENDERSON NINA WATER SYSTEM INC | LA1099006 | 5,535 | Ground water | 1 | Below the study levels |
| HOMER WATER SYSTEM, LA | LA1027003 | 4,524 | Ground water | 2 | Below the study levels |
| HOUMA WATER TREATMENT SERVICE AREA | LA1109001 | 11,658 | Surface water | 1 | Below the study levels |
| HOUSTON RIVER WATERWORKS DISTRICT 11 | LA1019119 | 6,915 | Ground water | 1 | Below the study levels |
| IBERIA WATER WORKS DISTRICT 3 - COTEAU | LA1045002 | 8,775 | Ground water | 1 | Below the study levels |
| INTRACOASTAL WATER SYSTEM WEST | LA1047002 | 6,489 | Surface water | 1 | Below the study levels |
| JEFF DAVIS CENTRAL WATERWORKS DISTRICT | LA1053012 | 5,709 | Ground water | 1 | Below the study levels |
| JEFF DAVIS WATER AND SEWER COMMISSION 1 | LA1053014 | 9,780 | Ground water | 1 | Below the study levels |
| JEFF DAVIS WATER DISTRICT 4 | LA1053013 | 4,194 | Ground water | 1 | Below the study levels |
| JONESBORO WATER SYSTEM, LA | LA1049010 | 6,231 | Ground water | 6 | Below the study levels |
| KEATCHIE WATER SYSTEM | LA1031007 | 4,446 | Ground water | 7 | Below the study levels |
| KIROLI DARBONNE WS | LA1073020 | 9,210 | Ground water | 3 | Below the study levels |
| KOLIN RUBY WISE WATERWORK DISTRICT 11 A | LA1079023 | 4,992 | Ground water | 2 | Below the study levels |
| LAFAYETTE UTILITIES WATER SYSTEM | LA1055017 | 169,389 | Ground water | 5 | Below the study levels |
| LAFOURCHE WATER DISTRICT 1 | LA1057001 | 81,609 | Surface water | 3 | Below the study levels |
| LAKE PROVIDENCE WATER SYSTEM | LA1035002 | 5,850 | Ground water | 1 | Below the study levels |
| LAWTELL WATER WORKS DISTRICT NO 1 | LA1097004 | 3,717 | Ground water | 1 | Below the study levels |
| LEE ROAD WATER CORPORATION | LA1103020 | 7,665 | Ground water | 2 | Below the study levels |
| LENA WATER SYSTEM INC | LA1079019 | 3,540 | Ground water | 4 | Below the study levels |
| LEWISBURG BELLEVUE WATER SYSTEM | LA1097006 | 8,226 | Ground water | 1 | Below the study levels |
| LOUISIANA STATE PENITENTIARY | LA1125005 | 6,362 | Ground water | 1 | Below the study levels |
| LPWD NORTH PRODUCTION FACILITY | LA1055171 | 4,122 | Ground water | 1 | Below the study levels |
| LPWD SOUTH | LA1055156 | 15,132 | Ground water purchased | 1 | Below the study levels |
| LPWDN NORTH REGION | LA1055191 | 16,833 | Ground water purchased | 1 | Below the study levels |
| LUTCHER WATERWORKS | LA1093003 | 4,781 | Surface water | 1 | Below the study levels |
| MAGNOLIA PLANTATION WATER SYSTEM INC | LA1113032 | 8,769 | Ground water | 1 | Below the study levels |
| MAGNOLIA WATER UTILITIES - EDEN ISLES | LA1103013 | 10,155 | Ground water | 1 | Below the study levels |
| MAGNOLIA WATER UTILITIES - GREENLEAVES | LA1103118 | 8,031 | Ground water | 2 | Below the study levels |
| MANDEVILLE WATER SUPPLY | LA1103023 | 13,000 | Ground water | 3 | Below the study levels |
| MANSFIELD WATER SYSTEM | LA1031009 | 7,512 | Surface water | 1 | Below the study levels |
| MILTON PURCHASE WATER SYSTEM | LA1055196 | 3,300 | Ground water purchased | 2 | Below the study levels |
| MINDEN WATER SYSTEM | LA1119021 | 16,281 | Ground water | 1 | Below the study levels |
| MIRE BRANCH WATER CORPORATION | LA1001024 | 9,480 | Ground water | 2 | Below the study levels |
| MONROE WATER SYSTEM, LA | LA1073031 | 57,000 | Surface water | 1 | Below the study levels |
| MONTEREY RURAL WATER SYSTEM INC | LA1029007 | 5,250 | Ground water | 1 | Below the study levels |
| MORGAN CITY WATER SYSTEM, LA | LA1101005 | 12,703 | Surface water | 1 | Below the study levels |
| NATCHITOCHES PARISH WWKS DISTRICT 2 | LA1069006 | 8,415 | Ground water | 1 | Below the study levels |
| NEW CARROLL WATER SYSTEM | LA1123005 | 3,507 | Ground water | 1 | Below the study levels |
| NEW IBERIA WATER SYSTEM (LAWCO) | LA1045009 | 59,928 | Ground water | 1 | Below the study levels |
| NEW LLANO WATER DEPARTMENT | LA1115022 | 3,300 | Ground water | 2 | Below the study levels |
| NEW ORLEANS CARROLLTON WW | LA1071009 | 334,903 | Surface water | 3 | Below the study levels |
| NEW ORLEANS ALGIERS WATER WORKS | LA1071001 | 52,785 | Surface water | 1 | Below the study levels |
| NEW ROADS WATER SYSTEM | LA1077026 | 9,024 | Ground water | 4 | Below the study levels |
| NORTH DESOTO WATER SYSTEM | LA1031011 | 7,608 | Ground water | 3 | Below the study levels |
| NORTH FRANKLIN WATER WORKS | LA1041003 | 7,989 | Ground water | 2 | Below the study levels |
| NORTH IBERVILLE WATER SYSTEM | LA1047024 | 1,524 | Ground water | 2 | Below the study levels |
| NORTH OF CROWLEY WATER CORPORATION | LA1001023 | 4,020 | Ground water | 1 | Below the study levels |
| PARISH UTILITIES OF ASCENSION | LA1005035 | 9,732 | Surface water | 1 | Below the study levels |
| PATTERSON WATER SYSTEM | LA1101006 | 8,456 | Surface water | 1 | Below the study levels |
| PINEHILL WATERWORKS DISTRICT | LA1017027 | 4,926 | Surface water purchased | 2 | Below the study levels |
| PLAISANCE WATER SYSTEM | LA1097012 | 6,465 | Ground water | 1 | Below the study levels |
| PLEASANT VALLEY WATER SYSTEM | LA1119023 | 1,683 | Ground water | 2 | Below the study levels |
| POINTE COUPEE WATER WORKS DISTRICT 1 | LA1077043 | 10,629 | Ground water | 4 | Below the study levels |
| POLLOCK AREA WATER SYSTEM INC | LA1043017 | 3,900 | Ground water | 2 | Below the study levels |
| PONTCHATOULA WATER SYSTEM | LA1105019 | 6,657 | Ground water | 3 | Below the study levels |
| PORT ALLEN WATER SYSTEM | LA1121014 | 6,759 | Ground water | 2 | Below the study levels |
| PORT SULPHUR WATER DISTRICT | LA1075006 | 10,308 | Surface water | 1 | Below the study levels |
| PRAIRIE RONDE WATER SYSTEM INC | LA1097014 | 6,090 | Ground water | 2 | Below the study levels |
| RAPIDES ISLAND WATER ASSOCIATION INC | LA1079020 | 5,658 | Ground water | 5 | Below the study levels |
| RAPIDES PARISH WATERWORKS DISTRICT 3 | LA1079017 | 19,983 | Surface water | 4 | Below the study levels |
| RAYVILLE WATER SYSTEM | LA1083006 | 4,842 | Ground water | 1 | Below the study levels |
| RESOLVE WHISPERWOOD ESTATES SD WS | LA1103046 | 6,867 | Ground water | 2 | Below the study levels |
| RURAL FRANKLINTON WATER | LA1117003 | 3,450 | Ground water | 2 | Below the study levels |
| RUSTON WATER SYSTEM | LA1061017 | 22,468 | Ground water | 9 | Below the study levels |
| SCHRIEVER WATER TREATMENT SERVICE AREA | LA1109002 | 116,460 | Surface water | 1 | Below the study levels |
| SHREVEPORT WATER SYSTEM | LA1017031 | 192,378 | Surface water | 1 | Below the study levels |
| SLIDELL WATER SUPPLY | LA1103041 | 35,547 | Ground water | 7 | Below the study levels |
| SOUTH CLAIBORNE WATER SYSTEM | LA1027006 | 3,843 | Ground water | 3 | Below the study levels |
| SOUTH GRANT WATER CORPORATION | LA1043008 | 5,289 | Ground water | 3 | Below the study levels |
| SOUTH MONROE WS GOWC | LA1073046 | 7,335 | Ground water | 1 | Below the study levels |
| SOUTH RAYNE WATER CORPORATION | LA1001022 | 4,254 | Ground water | 1 | Below the study levels |
| SOUTH TOLEDO BEND WATER DISTRICT | LA1085055 | 5,943 | Ground water | 1 | Below the study levels |
| SOUTHEAST WATERWORKS DISTRICT 2 | LA1113031 | 6,810 | Ground water | 1 | Below the study levels |
| SOUTHWEST ALLEN WW DISTRICT NO 2 | LA1003009 | 8,106 | Ground water | 3 | Below the study levels |
| SOUTHWEST OUACHITA WATERWORKS, INC | LA1073047 | 10,725 | Ground water | 6 | Below the study levels |
| ST BERNARD PARISH WATERWORKS | LA1087001 | 44,783 | Surface water | 1 | Below the study levels |
| ST CHARLES PARISH DEPT OF WATERWORKS | LA1089001 | 52,879 | Surface water | 2 | Below the study levels |
| ST JAMES WATER DISTRICT 1 | LA1093004 | 7,200 | Surface water | 1 | Below the study levels |
| ST JAMES WATER DISTRICT 2 | LA1093005 | 7,513 | Surface water | 1 | Below the study levels |
| ST JOHN WATER DISTRICT 2 | LA1095002 | 3,702 | Surface water | 1 | Below the study levels |
| ST LANDRY WATER WORKS DISTRICT 2 RURAL | LA1097033 | 4,761 | Ground water | 1 | Below the study levels |
| ST MARY PARISH W&S #2 BAYOU VISTA | LA1101015 | 5,379 | Surface water purchased | 1 | Below the study levels |
| ST MARY WATER & SEWER COMM #3 | LA1101010 | 7,828 | Surface water | 1 | Below the study levels |
| ST TAM PARISH - BRIARWOOD TERRACE | LA1103079 | 17,536 | Ground water | 5 | Below the study levels |
| ST TAM PARISH - CROSS GATES SD | LA1103053 | 8,037 | Ground water | 2 | Below the study levels |
| ST TAM PARISH-FAUBOURG-COQUILLE | LA1103149 | 18,372 | Ground water | 5 | Below the study levels |
| ST TAMMANY WATER DIST 2 | LA1103033 | 5,200 | Ground water | 1 | Below the study levels |
| SULPHUR CITY OF WATER SYSTEM | LA1019044 | 24,489 | Ground water | 2 | Below the study levels |
| SUMMERVILLE WATER SYSTEM | LA1059009 | 1,425 | Ground water | 1 | Below the study levels |
| TALLULAH WATER SYSTEM | LA1065003 | 8,601 | Ground water | 1 | Below the study levels |
| TANGIPAHOA (SECOND WARD) WATER DISTRICT | LA1105077 | 4,112 | Ground water | 4 | Below the study levels |
| TANGIPAHOA PARISH WATER DISTRICT | LA1105008 | 75,873 | Ground water | 12 | Below the study levels |
| TENSAS WATER DISTRICT ASSOCIATION | LA1107009 | 3,843 | Surface water | 1 | Below the study levels |
| TESI OSSUN HEIGHTS | LA1055140 | 393 | Ground water purchased | 1 | Below the study levels |
| THIBODAUX WATERWORKS | LA1057003 | 14,862 | Surface water | 1 | Below the study levels |
| TOWN & COUNTRY SERVICE | LA1073054 | 5,715 | Surface water purchased | 1 | Below the study levels |
| TOWN OF ALBANY WATER SYSTEM | LA1063022 | 7,305 | Ground water | 3 | Below the study levels |
| TOWN OF AMITE WATER SYSTEM | LA1105001 | 4,300 | Ground water | 3 | Below the study levels |
| TOWN OF ARNAUDVILLE WATER SYSTEM | LA1099001 | 3,957 | Ground water | 1 | Below the study levels |
| TOWN OF BENTON WATER SYSTEM | LA1015002 | 8,037 | Surface water purchased | 1 | Below the study levels |
| TOWN OF BERWICK | LA1101014 | 5,024 | Surface water purchased | 1 | Below the study levels |
| TOWN OF BUNKIE WATER SYSTEM | LA1009004 | 5,169 | Ground water | 1 | Below the study levels |
| TOWN OF CHURCH POINT WATER SYSTEM | LA1001001 | 4,176 | Ground water | 1 | Below the study levels |
| TOWN OF ERATH WATER SYSTEM | LA1113005 | 2,985 | Ground water | 1 | Below the study levels |
| TOWN OF FERRIDAY WATER SYSTEM | LA1029005 | 3,816 | Ground water | 1 | Below the study levels |
| TOWN OF FRANKLINTON WATER SYSTEM | LA1117002 | 4,150 | Ground water | 3 | Below the study levels |
| TOWN OF GREENWOOD WATER SYSTEM | LA1017014 | 5,205 | Surface water | 1 | Below the study levels |
| TOWN OF HAUGHTON WATER SYSTEM | LA1015011 | 5,355 | Ground water | 8 | Below the study levels |
| TOWN OF JENA WATER SYSTEM | LA1059003 | 3,614 | Ground water | 5 | Below the study levels |
| TOWN OF LAKE ARTHUR WATER SYSTEM | LA1053005 | 2,706 | Ground water | 2 | Below the study levels |
| TOWN OF LEONVILLE WATER SYSTEM | LA1097005 | 9,552 | Ground water | 3 | Below the study levels |
| TOWN OF LIVINGSTON WATER SYSTEM | LA1063013 | 8,946 | Ground water | 3 | Below the study levels |
| TOWN OF MAMOU WATER SYSTEM | LA1039005 | 4,559 | Ground water | 1 | Below the study levels |
| TOWN OF MARINGOUIN | LA1047003 | 3,300 | Ground water | 2 | Below the study levels |
| TOWN OF PEARL RIVER | LA1103157 | 3,333 | Ground water | 2 | Below the study levels |
| TOWN OF PLAUCHEVILLE WATER SYSTM | LA1009013 | 4,233 | Ground water | 2 | Below the study levels |
| TOWN OF PORT BARRE WATER SYSTEM | LA1097013 | 3,828 | Ground water | 1 | Below the study levels |
| TOWN OF SUNSET WATER SYSTEM | LA1097015 | 4,356 | Ground water | 2 | Below the study levels |
| TOWN OF VINTON WATER SYSTEM | LA1019048 | 4,101 | Ground water | 1 | Below the study levels |
| TOWN OF WELSH WATER SYSTEM | LA1053006 | 4,311 | Ground water | 1 | Below the study levels |
| TOWN OF WOODWORTH WATER SYSTEM | LA1079027 | 4,818 | Ground water | 2 | Below the study levels |
| UNITED WATER SYSTEM | LA1099009 | 4,446 | Ground water | 1 | Below the study levels |
| UTILITIES INC - KINGSPOINT SUBDIVISION | LA1103055 | 6,351 | Ground water | 2 | Below the study levels |
| UTILITIES INC - NORTH PARK WATER SUPPLY | LA1103124 | 11,298 | Ground water | 5 | Below the study levels |
| VARNADO WATER WORKS - PINE | LA1117025 | 840 | Ground water | 3 | Below the study levels |
| VERMILION WATERWORKS DISTRICT 1 | LA1113034 | 24,132 | Ground water | 3 | Below the study levels |
| VERNON PARISH WATER AND SEWER COMMISSION | LA1115071 | 5,295 | Ground water | 3 | Below the study levels |
| VILLAGE OF PARKS WATER SYSTEM | LA1099008 | 12,801 | Ground water | 1 | Below the study levels |
| VILLAGE OF TURKEY CREEK WATER SYSTEM | LA1039013 | 5,289 | Ground water | 3 | Below the study levels |
| VILLAGE WATER SYSTEM | LA1015018 | 10,890 | Ground water | 8 | Below the study levels |
| VIVIAN WATER SYSTEM | LA1017037 | 4,050 | Surface water | 1 | Below the study levels |
| W JEFFERSON WW DISTRICT 2 | LA1051004 | 140,264 | Surface water | 1 | Below the study levels |
| WALKER WATER SYSTEM | LA1063017 | 15,813 | Ground water | 4 | Below the study levels |
| WARD II WATER DISTRICT | LA1063039 | 78,147 | Ground water | 17 | Below the study levels |
| WATER & SEWER COMMISSION 4 OF ST MARY | LA1101011 | 9,709 | Surface water | 1 | Below the study levels |
| WATERWORKS DISTRICT 7 | LA1017052 | 5,817 | Ground water | 4 | Below the study levels |
| WBR DISTRICT 4 -SECTION ROAD WINTERVILLE | LA1121027 | 5,571 | Ground water | 3 | Below the study levels |
| WBR PUBLIC UTILITIES | LA1121008 | 4,329 | Ground water | 5 | Below the study levels |
| WESLEY CHAPEL WATER SYSTEM | LA1061020 | 4,080 | Ground water | 4 | Below the study levels |
| WEST BATON ROUGE WATER WORKS DISTRICT 2 | LA1121018 | 13,437 | Ground water | 5 | Below the study levels |
| WEST GRANT WATER ASSOCIATION | LA1043014 | 3,324 | Ground water | 1 | Below the study levels |
| WEST HWY 80 ARK ROAD WS | LA1073055 | 14,649 | Ground water | 2 | Below the study levels |
| WEST MONROE WATER SYSTEM | LA1073056 | 16,005 | Ground water | 5 | Below the study levels |
| WEST VERNON PARISH WATERWORKS DISTRICT | LA1115121 | 4,365 | Ground water | 1 | Below the study levels |
| WESTLAKE CITY OF WATER SYSTEM | LA1019054 | 4,858 | Ground water | 3 | Below the study levels |
| WESTVIEW WATER WORKS | LA1105028 | 1,134 | Ground water | 1 | Below the study levels |
| WESTWEGO WATERWORKS | LA1051005 | 8,534 | Surface water purchased | 1 | Below the study levels |
| WINNSBORO WATER SYSTEM | LA1041006 | 7,518 | Ground water | 1 | Below the study levels |
| WWKS DISTRICT 2 OF ST HELENA | LA1091007 | 8,772 | Ground water | 7 | Below the study levels |
| ZACHARY WATER SYSTEM | LA1033030 | 31,569 | Ground water | 5 | Below the study levels |
How the count works
What is included
Each active community water system with complete monitoring is counted once, even if it is linked with several ZIP codes. Private wells are excluded, and UCMR 5 did not comprehensively monitor every small system. This page does not apply Louisiana's state-specific standards or determine compliance. Use the official state or territory drinking-water program for current regulatory information.