| LOUISVILLE WATER COMPANY | | 806,997 | 0.0113 mg/L |
| KENTUCKY-AMERICAN WATER CO | | 669,042 | 0.0044 mg/L |
| NORTHERN KENTUCKY WATER DISTRICT | | 259,949 | 0.0070 mg/L |
| WARREN COUNTY WATER DISTRICT | | 91,118 | 0.0034 mg/L |
| HARDIN COUNTY WATER DISTRICT #2 | | 76,326 | 0.0097 mg/L |
| BOONE CO WATER & SEWER DISTRICT | | 66,300 | 0.0047 mg/L |
| PADUCAH WATER WORKS | | 65,004 | 0.0061 mg/L |
| OWENSBORO MUNICIPAL UTILITIES | | 60,473 | 0.0038 mg/L |
| BOWLING GREEN MUNICIPAL UTILITIES | | 53,601 | 0.0037 mg/L |
| FRANKFORT PLANT BOARD | | 52,153 | 0.0026 mg/L |
| GEORGETOWN MUNICIPAL WATER SERVICE | | 44,608 | 0.0050 mg/L |
| ASHLAND WATER WORKS | | 44,402 | 0.0088 mg/L |
| MOUNTAIN WATER DIST | | 44,057 | 0.0032 mg/L |
| FORT CAMPBELL WATER SYSTEM | | 43,270 | 0.0030 mg/L |
| HOPKINSVILLE WATER ENVIRONMENT AUTHORITY | | 41,350 | 0.0058 mg/L |
| OLDHAM COUNTY WATER DISTRICT | | 38,409 | 0.0059 mg/L |
| GLASGOW WATER COMPANY | | 36,766 | 0.0064 mg/L |
| RICHMOND UTILITIES | | 35,640 | 0.0054 mg/L |
| NICHOLASVILLE WATER DEPARTMENT | | 35,266 | 0.0031 mg/L |
| MCCREARY COUNTY WATER DISTRICT | | 34,439 | 0.0051 mg/L |
| DAVIESS CO WATER DISTRICT | | 33,655 | 0.0019 mg/L |
| MEADE COUNTY WATER DISTRICT | | 33,313 | 0.0064 mg/L |
| DANVILLE CITY WATER WORKS | | 32,600 | 0.0065 mg/L |
| HENDERSON WATER UTILITY/NORTH | | 31,705 | 0.0051 mg/L |
| FRANKLIN WATER WORKS | | 31,602 | 0.0045 mg/L |
| BARDSTOWN MUNICIPAL WATER DEPT | | 31,185 | 0.0031 mg/L |
| HARDIN COUNTY WATER DISTRICT #1 | | 30,230 | 0.0059 mg/L |
| WINCHESTER MUNICIPAL UTILITIES | | 29,823 | 0.0039 mg/L |
| SOMERSET WATER SERVICE | | 29,700 | 0.0050 mg/L |
| FLORENCE WATER & SEWER | | 29,351 | 0.0029 mg/L |
| MADISONVILLE LIGHT & WATER | | 28,102 | 0.0016 mg/L |
| PRESTONSBURG CITY UTILITIES | | 26,788 | 0.0054 mg/L |
| HAZARD WATER DEPARTMENT | | 26,730 | 0.0036 mg/L |
| MURRAY WATER SYSTEM | | 26,302 | 0.0071 mg/L |
| MADISON CO UTILITIES DISTRICT | | 25,120 | 0.0027 mg/L |
| CAMPBELLSVILLE MUNICIPAL WATER | | 24,874 | 0.0076 mg/L |
| PAINTSVILLE MUNICIPAL WATER WORKS | | 24,354 | 0.0048 mg/L |
| MT WASHINGTON WATER COMPANY | | 23,760 | 0.0047 mg/L |
| SHELBYVILLE WATER & SEWER COMMISSION | | 23,760 | 0.0100 mg/L |
| HARDIN CO. WATER DIST #1/FT. KNOX | | 23,600 | 0.0050 mg/L |
| WESTERN PULASKI CO WATER DISTRICT | | 23,264 | 0.0020 mg/L |
| TAYLORSVILLE WATER WORKS | | 22,286 | 0.0069 mg/L |
| COLUMBIA/ADAIR UTILITIES DISTRICT | | 22,113 | 0.0052 mg/L |
| FORT CAMPBELL | | 22,000 | — |
| SOUTHEASTERN WATER ASSOC/NELSON VALLEY | | 21,895 | 0.0055 mg/L |
| MONTICELLO WATER & SEWER COMMISSION | | 21,000 | 0.0020 mg/L |
| BULLOCK PEN WATER DISTRICT | | 20,048 | 0.0050 mg/L |
| GRAYSON COUNTY WATER DISTRICT | | 20,033 | 0.0030 mg/L |
| ROWAN WATER INC | | 18,765 | 0.0037 mg/L |
| HARDINSBURG RO WTP | | 18,437 | 0.0106 mg/L |
| EDMONSON CO WATER DISTRICT | | 17,848 | 0.0034 mg/L |
| VERSAILLES WATER SYSTEM | | 17,822 | 0.0047 mg/L |
| HENRY COUNTY WATER DISTRICT #2 | | 17,716 | 0.0029 mg/L |
| HENDERSON COUNTY WATER DISTRICT | | 17,447 | 0.0050 mg/L |
| GREEN RIVER VALLEY WATER DISTRICT | | 17,431 | 0.0037 mg/L |
| CHRISTIAN CO WATER DISTRICT | | 17,248 | 0.0067 mg/L |
| LAUREL CO WATER DISTRICT #2 | | 16,899 | 0.0020 mg/L |
| MUHLENBERG CO WATER DISTRICT | | 16,845 | 0.0028 mg/L |
| HARRISON CO WATER ASSOCIATION | | 16,736 | 0.0040 mg/L |
| PINEVILLE WATER SYSTEM | | 16,573 | 0.0048 mg/L |
| OHIO COUNTY WATER DISTRICT | | 16,511 | 0.0085 mg/L |
| BARBOURVILLE UTILITIES | | 16,420 | 0.0026 mg/L |
| ALLEN COUNTY WATER DISTRICT | | 16,398 | 0.0050 mg/L |
| MT STERLING WATER WORKS | | 16,391 | 0.0063 mg/L |
| MARION COUNTY WATER DISTRICT | | 16,311 | 0.0098 mg/L |
| NORTH MARSHALL WATER DISTRICT #1 | | 16,276 | 0.0045 mg/L |
| CORBIN UTILITIES COMMISSION | | 16,065 | 0.0043 mg/L |
| EAST LAUREL WATER DISTRICT | | 16,062 | 0.0051 mg/L |
| GREEN TAYLOR WATER DISTRICT | | 15,497 | 0.0047 mg/L |
| SOUTHERN WATER & SEWER DISTRICT | | 15,110 | 0.0045 mg/L |
| WOOD CREEK WATER DISTRICT | | 14,892 | 0.0030 mg/L |
| WEST LAUREL WATER ASSOC INC | | 14,878 | 0.0042 mg/L |
| GARRARD CO WATER ASSOC INC | | 14,806 | 0.0034 mg/L |
| LAWRENCEBURG WATER & SEWER DEPT | | 14,748 | 0.0045 mg/L |
| SOUTHERN MADISON WATER DISTRICT | | 14,707 | 0.0042 mg/L |
| NORTH SHELBY WATER DISTRICT | | 14,660 | 0.0066 mg/L |
| BARKLEY LAKE WATER DISTRICT | | 14,284 | 0.0087 mg/L |
| BUTLER COUNTY WATER SYSTEM INC | | 14,256 | 0.0020 mg/L |
| PARIS WATER WORKS | | 14,139 | 0.0058 mg/L |
| JACKSON CO WATER ASSOCIATION | | 13,629 | 0.0028 mg/L |
| NORTH NELSON WATER DISTRICT | | 13,365 | 0.0027 mg/L |
| SPRINGFIELD WATER WORKS | | 13,205 | 0.0085 mg/L |
| BIG SANDY WATER DISTRICT | | 13,044 | 0.0028 mg/L |
| WESTERN ROCKCASTLE WATER ASSOC | | 12,623 | 0.0056 mg/L |
| EUBANK WATER SYSTEM | | 12,492 | 0.0041 mg/L |
| EAST CASEY CO WATER DISTRICT | | 12,460 | 0.0030 mg/L |
| MAYFIELD ELECTRIC & WATER | | 12,379 | 0.0039 mg/L |
| GREENUP WATER SYSTEM | | 12,193 | 0.0034 mg/L |
| WATER SERVICE CORPORATION OF KENTUCKY | | 12,022 | 0.0030 mg/L |
| E DAVIESS CO WATER ASSOC INC | | 11,997 | 0.0020 mg/L |
| RATTLESNAKE RIDGE WATER DISTRICT | | 11,397 | 0.0040 mg/L |
| MANCHESTER WATER WORKS | | 11,349 | 0.0018 mg/L |
| MAYSVILLE UTILITY COMMISSION | | 11,263 | 0.0045 mg/L |
| GRAYSON UTILITY COMMISSION | | 10,950 | 0.0055 mg/L |
| BATH COUNTY WATER DISTRICT | | 10,083 | 0.0061 mg/L |
| LAGRANGE UTILITIES COMMISSION | | 10,067 | 0.0047 mg/L |
| BEREA MUNICIPAL UTILITIES | | 9,972 | 0.0060 mg/L |
| WHITLEY CO WATER DISTRICT | | 9,825 | 0.0020 mg/L |
| TODD COUNTY WATER DISTRICT | | 9,801 | 0.0030 mg/L |
| NORTH MERCER WATER DISTRICT | | 9,775 | 0.0090 mg/L |