| 1 | POTRERO ELEMENTARY SCHOOL | CA | 250.2 ppt | 25× |
| 2 | BAYLEAF MASTER | NC | 152.6 ppt | 15× |
| 3 | RUNNING SPRINGS WATER DISTRICT | CA | 95.5 ppt | 9.6× |
| 4 | NEW MARTINSVILLE | WV | 84.1 ppt | 8.4× |
| 5 | GWA NORTHERN WATER SYSTEM | GU | 80.0 ppt | 8.0× |
| 6 | SAUKVILLE WATERWORKS | WI | 73.0 ppt | 7.3× |
| 7 | TEMPE CITY OF | AZ | 70.5 ppt | 7.0× |
| 8 | PEWAUKEE CITY WATER AND SEWER UTILITY | WI | 69.0 ppt | 6.9× |
| 9 | GREAT BEND, CITY OF | KS | 60.0 ppt | 6.0× |
| 10 | CITY OF ATWATER | CA | 59.0 ppt | 5.9× |
| 11 | ARTONDALE WATER SYSTEM | WA | 55.8 ppt | 5.6× |
| 12 | EMERALD COAST UTILITIES AUTHORITY | FL | 55.3 ppt | 5.5× |
| 13 | MOSES LAKE CITY OF | WA | 54.1 ppt | 5.4× |
| 14 | YESHIVA FARM SETTLEMENT | NY | 51.6 ppt | 5.2× |
| 15 | AUGUSTA-RICHMOND CO WS | GA | 51.2 ppt | 5.1× |
| 16 | QUISTORFF | WA | 44.0 ppt | 4.4× |
| 17 | OCALA, CITY OF (2 WTPS) | FL | 42.0 ppt | 4.2× |
| 18 | RIVERTON, CITY OF | WY | 37.0 ppt | 3.7× |
| 19 | HAWLEY WSC | TX | 36.4 ppt | 3.6× |
| 20 | BIG BEAR CITY CSD | CA | 36.0 ppt | 3.6× |
| 21 | SIOUX CITY WATER SUPPLY | IA | 35.0 ppt | 3.5× |
| 22 | NASHVILLE, TOWN OF | NC | 35.0 ppt | 3.5× |
| 23 | Sauk Rapids | MN | 34.2 ppt | 3.4× |
| 24 | ATASCADERO STATE HOSPITAL | CA | 34.0 ppt | 3.4× |
| 25 | FORT CAMPBELL WATER SYSTEM | TN | 33.6 ppt | 3.4× |
| 26 | RUCH ELEMENTARY SD 549 | OR | 33.4 ppt | 3.3× |
| 27 | EMMAUS BOROUGH PUBLIC WATER | PA | 33.2 ppt | 3.3× |
| 28 | CITY OF ABILENE | TX | 32.4 ppt | 3.2× |
| 29 | WILLIAMSTOWN WATER DEPT | WV | 31.3 ppt | 3.1× |
| 30 | DUXBURY WATER DEPARTMENT | MA | 31.0 ppt | 3.1× |
| 31 | CITY OF FRESNO | CA | 30.0 ppt | 3.0× |
| 32 | INDEPENDENCE TOWNSHIP | MI | 30.0 ppt | 3.0× |
| 33 | SHARON WATER DEPT | MA | 29.0 ppt | 2.9× |
| 34 | ELKO CITY OF | NV | 29.0 ppt | 2.9× |
| 35 | WIDEFIELD WSD | CO | 28.4 ppt | 2.8× |
| 36 | BEAVER BORO MUNI AUTH | PA | 28.2 ppt | 2.8× |
| 37 | TANGLEWOOD ON TEXOMA | TX | 28.0 ppt | 2.8× |
| 38 | CITY OF FORT WORTH | TX | 25.8 ppt | 2.6× |
| 39 | SOUTH BEND WATER WORKS | IN | 25.6 ppt | 2.6× |
| 40 | BROOKWOOD COMM WTR SYSTEM | NC | 25.6 ppt | 2.6× |
| 41 | GARDEN CITY WATER AND SEWER SYSTEM | ID | 25.4 ppt | 2.5× |
| 42 | CITY OF BOERNE | TX | 24.7 ppt | 2.5× |
| 43 | GRAND ISLAND, CITY OF | NE | 24.6 ppt | 2.5× |
| 44 | LADY LAKE CENTRAL - WPS 1,2,3 | FL | 24.1 ppt | 2.4× |
| 45 | GLOBE CITY OF | AZ | 23.7 ppt | 2.4× |
| 46 | PAYSON TOWN OF | AZ | 22.7 ppt | 2.3× |
| 47 | ST JAMES PWS | MO | 22.5 ppt | 2.3× |
| 48 | CITY OF CLYDE | TX | 22.5 ppt | 2.3× |
| 49 | CAL-WATER SERVICE CO.-CHICO | CA | 22.1 ppt | 2.2× |
| 50 | CITY OF PLEASANTON | CA | 22.0 ppt | 2.2× |
| 51 | TRI-COUNTY RWD #2 | OK | 22.0 ppt | 2.2× |
| 52 | HILDALE - COLORADO CITY | UT | 22.0 ppt | 2.2× |
| 53 | EULA WSC | TX | 21.3 ppt | 2.1× |
| 54 | NPS-MOUNT RUSHMORE NATIONAL MEMORIAL | SD | 20.8 ppt | 2.1× |
| 55 | MARANA MUNICIPAL - MARANA | AZ | 20.7 ppt | 2.1× |
| 56 | FRUSI WATER TREATMENT PLANT | KS | 20.1 ppt | 2.0× |
| 57 | GRIFFIN | GA | 20.0 ppt | 2.0× |
| 58 | POTOSI WSC | TX | 19.9 ppt | 2.0× |
| 59 | Commonwealth Utilities Corp (Saipan) | MP | 19.6 ppt | 2.0× |
| 60 | CITY OF SACRAMENTO MAIN | CA | 19.1 ppt | 1.9× |
| 61 | FAYETTEVILLE PUBLIC WORKS COMM | NC | 19.1 ppt | 1.9× |
| 62 | MANTECA, CITY OF | CA | 19.0 ppt | 1.9× |
| 63 | CITRUS CO UTL/CHARLES A. BLACK | FL | 19.0 ppt | 1.9× |
| 64 | WRIGHT-PATTERSON AFB AREA B PWS | OH | 19.0 ppt | 1.9× |
| 65 | SHAW AFB (SC4310501) | SC | 19.0 ppt | 1.9× |
| 66 | CITY OF TYE | TX | 19.0 ppt | 1.9× |
| 67 | DYESS AIR FORCE BASE | TX | 19.0 ppt | 1.9× |
| 68 | LIBERTY WATER LPSCO | AZ | 18.9 ppt | 1.9× |
| 69 | BARROW UTILITIES & ELEC. COOP., INC. (BU | AK | 18.5 ppt | 1.9× |
| 70 | CRESTLINE VILLAGE CWD - DIVISION 10 | CA | 18.3 ppt | 1.8× |
| 71 | NORTH PARK PWD | IL | 18.2 ppt | 1.8× |
| 72 | SALT LAKE CITY WATER SYSTEM | UT | 18.2 ppt | 1.8× |
| 73 | ZEPHYRHILLS CITY OF | FL | 18.1 ppt | 1.8× |
| 74 | CITY OF HALTOM CITY | TX | 18.1 ppt | 1.8× |
| 75 | LAKE PANASOFFKEE WATER ASSN 2WPS | FL | 18.0 ppt | 1.8× |
| 76 | SPALDING COUNTY WATER SYSTEM | GA | 18.0 ppt | 1.8× |
| 77 | SELMA, TOWN OF | NC | 18.0 ppt | 1.8× |
| 78 | PRESCOTT WATERWORKS | WI | 18.0 ppt | 1.8× |
| 79 | CANNON AIR FORCE BASE WATER SYSTEM | NM | 17.7 ppt | 1.8× |
| 80 | Waite Park | MN | 17.0 ppt | 1.7× |
| 81 | Woodbury | MN | 17.0 ppt | 1.7× |
| 82 | FAIRCHILD AIR FORCE BASE | WA | 17.0 ppt | 1.7× |
| 83 | GREENSBORO, CITY OF | NC | 16.8 ppt | 1.7× |
| 84 | PONCE URBANO | PR | 16.7 ppt | 1.7× |
| 85 | SAMMAMISH PLATEAU WATER & SEWER | WA | 16.5 ppt | 1.6× |
| 86 | 439 WSC | TX | 16.4 ppt | 1.6× |
| 87 | JACKSON WATER SYSTEM | TN | 16.3 ppt | 1.6× |
| 88 | HARRISON CO WATER ASSOC | KY | 15.3 ppt | 1.5× |
| 89 | SPENCER ROAD PUD | TX | 15.3 ppt | 1.5× |
| 90 | BROKEN ARROW MUNICIPAL AUTHORITY | OK | 15.2 ppt | 1.5× |
| 91 | MARANA MUNICIPAL - HARTMAN VISTAS | AZ | 15.0 ppt | 1.5× |
| 92 | CITY OF MERCED | CA | 15.0 ppt | 1.5× |
| 93 | WAVERLY WATER DEPARTMENT | IA | 15.0 ppt | 1.5× |
| 94 | TRUCKEE MEADOWS WATER AUTHORITY | NV | 15.0 ppt | 1.5× |
| 95 | WAGONER CO. RWD #5 | OK | 15.0 ppt | 1.5× |
| 96 | CITY OF HUDSON OAKS | TX | 15.0 ppt | 1.5× |
| 97 | PEACOCK HILL | WA | 14.9 ppt | 1.5× |
| 98 | US ARMY FORT HUACHUCA | AZ | 14.7 ppt | 1.5× |
| 99 | HELENDALE COMMUNITY SERVICE DISTRICT | CA | 14.6 ppt | 1.5× |
| 100 | MOORE CREEK MOUNT CARMEL UTILITIES | FL | 14.5 ppt | 1.4× |
