| SOCIAL SPRINGS WATER SYSTEM NORTH | RINGGOLD, LA | 744 | 38 | — |
| BOB COMMUNITY WATERWORKS | POLLOCK, LA | 732 | 29 | — |
| VILLAGE OF HOSSTON WATER SYSTEM | HOSSTON, LA | 729 | 493 | — |
| PINE HILL WATER SYSTEM | HAYNESVILLE, LA | 729 | 49 | — |
| EROS COMMUNITY WATER SYSTEM | EROS, LA | 729 | 366 | — |
| VILLA FELICIANA MEDICAL COMPLEX | JACKSON, LA | 726 | 100 | — |
| SUN WATER SUPPLY | SUN, LA | 726 | 129 | — |
| LETON WATER SYSTEM | MINDEN, LA | 726 | 19 | — |
| TOWN OF CLAYTON WATER SYSTEM | CLAYTON, LA | 723 | 523 | — |
| VILLAGE OF DODSON WATER SYSTEM | DODSON, LA | 714 | 40 | — |
| WARD 5 WATERWORKS DISTRICT 1 - LONE PINE | ST. LANDRY, LA | 711 | 43 | — |
| JUNCTION CITY WATER SYSTEM | JUNCTION CITY, LA | 708 | 31 | — |
| PROVENCAL WATER SYSTEM | PROVENCAL, LA | 702 | 170 | — |
| FLORIEN WATER SYSTEM | FLORIEN, LA | 700 | 48 | — |
| JONES MCGINTY WATER SYSTEM | BONITA, LA | 696 | 738 | — |
| SANDERSON FARMS, INC | LAUREL, LA | 690 | 14 | — |
| VILLAGE OF RIDGECREST WATER SUPPLY | RIDGECREST, LA | 684 | 436 | — |
| GRAND CANE WATER SYSTEM | KEATCHIE, LA | 675 | 45 | — |
| MCDONALD WATER SYSTEM | JONESBORO, LA | 675 | 28 | — |
| GILARK WATER SYSTEM | MINDEN, LA | 675 | 159 | — |
| BEAUREGARD WATER DISTRICT #5 | MERRYVILLE, LA | 672 | 7 | — |
| FAIRVIEW MOBILE ESTATES NORTH WS | PRAIRIEVILLE, LA | 669 | 20 | — |
| VILLAGE OF ROSEDALE WATER SYSTEM | ROSEDALE, LA | 664 | 50 | — |
| MOSSVILLE WW DISTRICT NO 2 | LAKE CHARLES, LA | 660 | 47 | — |
| HUDSON GAARS MILL WATER SYSTEM | DODSON, LA | 660 | 1,416 | — |
| DEEPWOODS UTILITIES INC | KEITHVILLE, LA | 657 | 40 | — |
| SANDY POINT 480 WATER SYSTEM | CAMPTI, LA | 654 | 707 | — |
| MAGNOLIA-LAKE STREET | DES PERES, LA | 651 | 61 | — |
| PACKAGING CORP OF AMERICA - DERIDDER | DERIDDER, LA | 650 | 14 | — |
| CASH MAGIC BREAUX BRIDGE LLC | BREAUX BRIDGE, LA | 650 | 3 | — |
| EVANGELINE PARISH INDUSTRIAL PARK W S | VILLE PLATTE, LA | 648 | 65 | — |
| QUITMAN WATER SYSTEM | QUITMAN, LA | 648 | 17 | — |
| MT OLIVE WATER SYSTEM | QUITMAN, LA | 645 | 174 | — |
| GLEN LEAF MOBILE HOME COMMUNITY | SHREVEPORT, LA | 645 | 15 | — |
| CLARENCE WATER SYSTEM | CLARENCE, LA | 642 | 236 | — |
| PINECREST MOBILE HOME VILLAGE | SHREVEPORT, LA | 639 | 11 | — |
| VILLAGE OF SIKES WATER SYSTEM | SIKES, LA | 639 | 1,279 | — |
| ADVENTURES RV RESORT | MANDEVILLE, LA | 635 | 81 | — |
| MAGNOLIA-BRIER LAKE UTILITIES INC | DES PERES, LA | 630 | 3 | — |
| WHITEHALL WATER SYSTEM INC | JONESVILLE, LA | 627 | 45 | — |
| POWHATAN WATER SYSTEM | MANY, LA | 612 | 405 | — |
| UTILITIES INC - OAKMONT SUBD | MANDEVILLE, LA | 612 | 0 | — |
| FOUR FORKS WATER SYSTEM | KEITHVILLE, LA | 609 | 55 | — |
| COLLINSTON WATER SYSTEM | COLLINSTON, LA | 609 | 167 | — |
| ST TAM PARISH - ABITA LAKES | COVINGTON, LA | 609 | 1 | — |
| SIXTH WARD JR HIGH W S | COVINGTON, LA | 607 | 12 | — |
| GILLIS LONG CENTER | CARVILLE, LA | 600 | 22 | Detected |
| PINE CREST TRAILER PARK | SLIDELL, LA | 600 | 30 | — |
| SANDY HILL WATER & SEWER | LEESVILLE, LA | 600 | 91 | — |
| SALT WORKS WATER SYSTEM | SIBLEY, LA | 600 | 67 | — |