| YOUNGSTOWN CITY PWS | 130,530 | 12 | Detected |
| AQUA OHIO - STRUTHERS | 58,551 | 123 | Detected |
| CANFIELD CITY PWS | 7,767 | 33 | Detected |
| HOLLYWOOD GAMING @ MVRC | 7,625 | 2 | Clean |
| SEBRING VILLAGE PWS | 6,058 | 331 | Clean |
| JACKSON/MILTON METRO WATER DISTRICT PWS | 3,728 | 38 | Detected |
| GREENFORD CHRISTIAN LIFE CENTER (C, D,E) | 1,623 | 23 | — |
| SOUTH RANGE LOCAL SCHOOLS K-12 PWS | 1,524 | 13 | — |
| QUAKER CITY MOTORSPORTS PARK PWS | 1,000 | 15 | — |
| WESTERN RESERVE SCHOOLS (K-12 CAMPUS) | 855 | 16 | — |
| BOARDMAN PARK-MAIN WELL PWS | 601 | 45 | — |
| USACE-BERLIN LAKE/ MILL CREEK REC. AREA | 527 | 4 | — |
| COLONIAL VILLA MHC, LLC | 450 | 19 | — |
| DAMASCUS ELEMENTARY PWS | 326 | 68 | — |
| CHAPARRAL FAMILY CAMPGROUND PWS | 300 | 63 | — |
| COUNTRY PANTRY INC / MARATHON PWS | 300 | 50 | — |
| SOUTH RANGE LOCAL SCHOOLS ATH COMPLEX | 250 | 0 | — |
| DEER MEADOWS MHP | 242 | 105 | — |
| PEABERRY PLAZA | 241 | 135 | — |
| WHITEHOUSE FRUIT FARM | 226 | 24 | — |
| LAKESIDE CAMPGROUND | 225 | 3 | — |
| WESTERN RESERVE PARK - BATHHOUSE PWS | 225 | 76 | — |
| WESTERN RESERVE PARK - CAMPGROUND PWS | 225 | 58 | — |
| TIC TOC FOOD MART #203 | 220 | 57 | — |
| LAKE MILTON - BERLIN KOA NORTH WELL PWS | 220 | 29 | — |
| DOLLAR GENERAL #17813 - ELLSWORTH | 220 | 0 | — |
| BEDFORD TRAILS GOLF COURSE | 214 | 19 | — |
| GREENFORD CHRISTIAN CHURCH (BLDGS A & B) | 202 | 41 | — |
| BENS RESTAURANT AND BAR INC PWS | 200 | 144 | — |
| WESTERN RESERVE MOTORCYCLE CLUB PWS | 185 | 12 | — |
| BERLIN CENTER UNITED METHODIST CHURCH | 160 | 18 | — |
| FAMILY DOLLAR - BELOIT #29180 PWS | 158 | 3 | — |
| SOCIETY OF ST PAUL | 150 | 45 | — |
| MASTROPIETRO WINERY PWS | 150 | 11 | — |
| G'S PIZZA WORLD - BERLIN CENTER PWS | 150 | 6 | — |
| SALEM HILLS GOLF AND CC | 140 | 3 | — |
| LAKE MILTON - BERLIN KOA SOUTH WELL PWS | 130 | 41 | — |
| LAKE MILTON BAPTIST TEMPLE | 130 | 11 | — |
| REAL LIFE CHURCH | 120 | 107 | — |
| COMMUNITY BIBLE CHURCH - BELOIT | 120 | 28 | — |
| LAKE MILTON RV RESORT & MHP | 108 | 33 | — |
| LAKESIDE GOLF COURSE | 108 | 93 | — |
| BAIRD BROTHERS SAWMILL, INC. | 105 | 28 | — |
| GREENFORD EVAN LUTHERAN CHURCH PWS | 100 | 6 | — |
| FLYING B GOLF COURSE | 100 | 23 | — |
| MAHONING VALLEY MARKET &MARATHON GAS PWS | 100 | 0 | — |
| BULLDOG'S BAR AND GRILL | 96 | 62 | — |
| PARADISE UNITED CHURCH OF CHRIST | 75 | 101 | — |
| CONNECTING POINT CHAPEL PWS | 75 | 16 | — |
| CHRISTIAN LIFE CENTER PWS | 65 | 31 | — |