| TOWN OF VIDALIA WATER SYSTEM | | 6,354 | 0.0201 ug/L |
| VILLAGE OF PARKS WATER SYSTEM | | 12,801 | 0.0064 ug/L |
| CITY OF PLAQUEMINE WATER SYSTEM | | 14,043 | 0.0062 ug/L |
| PORT SULPHUR WATER DISTRICT | | 10,308 | 0.0046 ug/L |
| NEW ORLEANS ALGIERS WATER WORKS | | 52,785 | 0.0045 ug/L |
| PARISH UTILITIES OF ASCENSION | | 9,732 | 0.0045 ug/L |
| NEW ORLEANS CARROLLTON WATER WORKS | | 334,903 | 0.0042 ug/L |
| BATON ROUGE WATER COMPANY | | 596,844 | Not detected |
| E JEFFERSON WW DISTRICT 1 | | 275,163 | Not detected |
| CITY OF SHREVEPORT WATER SYSTEM | | 192,378 | Not detected |
| LAFAYETTE UTILITIES WATER SYSTEM | | 169,389 | Not detected |
| W JEFFERSON WW DISTRICT 2 | | 140,264 | Not detected |
| SCHRIEVER WATER TREATMENT SERVICE AREA | | 116,460 | Not detected |
| LAFOURCHE WATER DISTRICT 1 | | 81,609 | Not detected |
| CITY OF BOSSIER CITY WATER SYSTEM | | 79,506 | Not detected |
| CITY OF LAKE CHARLES WATER SYSTEM | | 79,500 | Not detected |
| WARD II WATER DISTRICT | | 78,147 | Not detected |
| TANGIPAHOA PARISH WATER DISTRICT | | 75,873 | Not detected |
| CITY OF ALEXANDRIA WATER SYSTEM | | 66,798 | Not detected |
| LAWCO - NEW IBERIA WATER SYSTEM | | 59,928 | Not detected |
| CITY OF MONROE WATER SYSTEM | | 57,000 | Not detected |
| ST CHARLES PARISH DEPT OF WATERWORKS | | 52,879 | Not detected |
| ST BERNARD PARISH WATERWORKS | | 44,783 | Not detected |
| SLIDELL WATER SUPPLY | | 35,547 | Not detected |
| ST JOHN WATER DISTRICT 3 | | 31,965 | Not detected |
| ZACHARY WATER SYSTEM | | 31,569 | Not detected |
| CITY OF NATCHITOCHES WATER SYSTEM | | 27,693 | Not detected |
| CITY OF DENHAM SPRINGS WATER SYSTEM | | 25,725 | Not detected |
| SULPHUR CITY OF WATER SYSTEM | | 24,489 | Not detected |
| VERMILION WATERWORKS DISTRICT 1 | | 24,132 | Not detected |
| BEAUREGARD WATER WORKS DIST #3 | | 24,000 | Not detected |
| CITY OF RUSTON WATER SYSTEM | | 22,468 | Not detected |
| ASSUMPTION PARISH WW DISTRICT 1 | | 21,366 | Not detected |
| CITY OF HAMMOND WATER SYSTEM | | 21,135 | Not detected |
| CALCASIEU PARISH WW DISTRICT NO 1 | | 20,837 | Not detected |
| CITY OF OPELOUSAS WATER SYSTEM | | 20,388 | Not detected |
| CITY OF PINEVILLE WATER SYSTEM | | 20,358 | Not detected |
| RAPIDES PARISH WATERWORKS DISTRICT 3 | | 19,983 | Not detected |
| BELLE CHASSE WATER DISTRICT | | 19,644 | Not detected |
| ST TAM PARISH- BEDICO -FAUBOURG-COQUILLE | | 18,372 | Not detected |
| BASTROP WATER SYSTEM | | 18,105 | Not detected |
| LAWCO - CROWLEY WATER SYSTEM | | 17,733 | Not detected |
| ST TAM PARISH - BRIARWOOD TERRACE | | 17,536 | Not detected |
| GRETNA WATERWORKS | | 17,026 | Not detected |
| LPWDN NORTH REGION | | 16,833 | Not detected |
| CITY OF GONZALES WATER SYSTEM | | 16,806 | Not detected |
| TOWN OF BLANCHARD WATER SYSTEM | | 16,326 | Not detected |
| CITY OF MINDEN WATER SYSTEM | | 16,281 | Not detected |
| CITY OF COVINGTON WATER SUPPLY | | 16,185 | Not detected |
| WEST MONROE WATER SYSTEM | | 16,005 | Not detected |
| TOWN OF WALKER WATER SYSTEM | | 15,813 | Not detected |
| LAWCO - EUNICE WATER SYSTEM | | 15,393 | Not detected |
| LPWD SOUTH | | 15,132 | Not detected |
| THIBODAUX WATERWORKS | | 14,862 | Not detected |
| EAST FELICIANA RURAL WATER | | 14,829 | Not detected |
| WEST HWY 80 ARK ROAD WS | | 14,649 | Not detected |
| CALCASIEU PARISH WW DIST 9 CARLYSS | | 14,502 | Not detected |
| CITY OF DERIDDER WATER SYSTEM | | 14,400 | Not detected |
| CITY OF ABBEVILLE WATER SYSTEM | | 14,217 | Not detected |
| CITY OF BOGALUSA WATER SYSTEM | | 14,000 | Not detected |
| CITY OF BAKER WATER SYSTEM | | 13,855 | Not detected |
| WEST BATON ROUGE WATER WORKS DISTRICT 2 | | 13,437 | Not detected |
| GOWC NORTH WATER SYSTEM | | 13,287 | Not detected |
| CITY OF MANDEVILLE WATER SUPPLY | | 13,000 | Not detected |
| BARKSDALE AFB WATER SYSTEM | | 13,000 | Not detected |
| CITY OF MORGAN CITY WATER SYSTEM | | 12,703 | Not detected |
| CECILIA WATER CORPORATION | | 12,420 | Not detected |
| BUCKEYE WATER DISTRICT 50 | | 12,078 | Not detected |
| WEST FELICIANA CONSOL WWKS DISTRICT 13 | | 12,045 | Not detected |
| GOWC EAST WATER SYSTEM | | 11,742 | Not detected |
| HOUMA WATER TREATMENT SERVICE AREA | | 11,658 | Not detected |
| CITY OF CARENCRO WATER SYSTEM | | 11,301 | Not detected |
| UTILITIES INC - NORTH PARK WATER SUPPLY | | 11,298 | Not detected |
| CHENIERE DREW NORTH WATER SYSTEM | | 11,280 | Not detected |
| CITY OF RAYNE WATER SYSTEM | | 10,908 | Not detected |
| FORT POLK SOUTH WATER SYSTEM | | 10,902 | Not detected |
| VILLAGE WATER SYSTEM | | 10,890 | Not detected |
| BAYOU LIBERTY WATER ASSOCIATION | | 10,791 | Not detected |
| SOUTHWEST OUACHITA WATERWORKS, INC | | 10,725 | Not detected |
| POINTE COUPEE WATER WORKS DISTRICT 1 | | 10,629 | Not detected |
| CITY OF LEESVILLE WATER SYSTEM | | 10,545 | Not detected |
| ST JOHN WATER DISTRICT 1 | | 10,484 | Not detected |
| BAYOU TECHE WATER WORKS | | 10,137 | Not detected |
| CITY OF BREAUX BRIDGE WATER SYSTEM | | 10,098 | Not detected |
| CITY OF JENNINGS WATER SYSTEM | | 9,837 | Not detected |
| JEFF DAVIS WATER AND SEWER COMMISSION 1 | | 9,780 | Not detected |
| WATER & SEWER COMMISSION 4 OF ST MARY | | 9,709 | Not detected |
| CITY OF SCOTT WATER SYSTEM | | 9,696 | Not detected |
| BROWNVILLE WATER SYSTEM | | 9,696 | Not detected |
| TOWN OF LEONVILLE WATER SYSTEM | | 9,552 | Not detected |
| MIRE BRANCH WATER CORPORATION | | 9,480 | Not detected |
| FORT POLK NORTH WATER SYSTEM | | 9,420 | Not detected |
| KIROLI DARBONNE WS | | 9,210 | Not detected |
| TOWN OF NEW ROADS WATER SYSTEM | | 9,024 | Not detected |
| TOWN OF LIVINGSTON WATER SYSTEM | | 8,946 | Not detected |
| IBERIA WATER WORKS DISTRICT 3 - COTEAU | | 8,775 | Not detected |
| WWKS DISTRICT 2 OF ST HELENA | | 8,772 | Not detected |
| MAGNOLIA PLANTATION WATER SYSTEM INC | | 8,769 | Not detected |
| TALLULAH WATER SYSTEM | | 8,601 | Not detected |
| WESTWEGO WATERWORKS | | 8,534 | Not detected |