| SALEM CITY | 16,850 | 63 | Clean |
| EAST LIVERPOOL CITY | 12,586 | 316 | Detected |
| BUCKEYE WATER DISTRICT - OHIO RIVER | 10,300 | 112 | Clean |
| COLUMBIANA CITY PWS | 6,727 | 8 | Detected |
| EAST PALESTINE VILLAGE PWS | 4,761 | 37 | Clean |
| LISBON VILLAGE | 2,821 | 301 | — |
| LEETONIA VILLAGE PWS | 1,833 | 145 | — |
| SALEM REGIONAL MEDICAL CENTER | 1,310 | 0 | — |
| NEW WATERFORD VILLAGE PWS | 1,238 | 299 | — |
| DAMASCUS FRIENDS CHURCH | 850 | 56 | — |
| WASHINGTONVILLE VILLAGE PWS | 801 | 122 | — |
| AQUA OHIO - TOMAHAWK UTILITIES | 715 | 18 | — |
| UNITED LOCAL HIGH SCHOOL | 710 | 25 | — |
| ROGERS COMMUNITY AUCTION | 700 | 34 | — |
| SWIFT MART INC. | 570 | 65 | — |
| TIMASHAMIE FAMILY CAMPGROUND | 495 | 15 | — |
| ANDIS CONVENIENCE STORE PWS | 400 | 120 | — |
| BAGH INC. DBA WESTVILLE SUNOCO | 400 | 45 | — |
| WINONA FRIENDS CHURCH | 300 | 35 | — |
| DOLLAR GENERAL #20799 - DAMASCUS PWS | 223 | 0 | — |
| DOLLAR GENERAL #22289 - EAST PALESTINE | 223 | 0 | — |
| DOLLAR GENERAL #22472 - MINERVA | 223 | 0 | — |
| DOLLAR GENERAL #16096 - HANOVERTON | 223 | 0 | — |
| DOLLAR GENERAL - 30195 - LISBON | 223 | 0 | — |
| BIG ARBS CAMPGROUND PWS | 220 | 33 | — |
| DAIRY QUEEN-LISBON | 208 | 60 | — |
| FIRESIDE LAKE - CG PWS | 204 | 86 | — |
| FLYING FINN FAMILY CAMPGROUND | 203 | 81 | — |
| ODNR-GUILFORD LAKE STATE PARK - CAMPGROU | 200 | 12 | — |
| COLUMBIANA COUNTY-COUNTY HOME RD PWS | 200 | 10 | — |
| FAMILY DOLLAR - LISBON | 200 | 6 | — |
| MARKS LANDING PWS | 175 | 37 | — |
| LAKE PNA SPORTSMAN CLUB PWS | 165 | 59 | — |
| EAST PALESTINE COUNTRY CLUB | 157 | 11 | — |
| WESTVILLE LAKE C. C., INC. | 156 | 9 | — |
| SLEEPY HOLLOW GOLF CLUB | 153 | 26 | — |
| CAUSEWAY CAMPGROUND | 153 | 57 | — |
| E FAIRFIELD UNITED METHODIST CHURCH | 152 | 25 | — |
| SALEM SAXON CLUB | 150 | 50 | — |
| CHURCH OF JESUS CHRIST OF LDS - COLUMBIA | 150 | 27 | — |
| DOLLAR GENERAL #12518 - ROGERS | 150 | 3 | — |
| ROGERS ASSEMBLY OF GOD | 145 | 54 | — |
| WINONA METHODIST CHURCH PWS | 145 | 0 | — |
| DAMASCUS METHODIST CHURCH | 134 | 5 | — |
| CHURCH OF GOD IN CHRIST MENNONITE | 130 | 75 | — |
| HEARTLAND CHRISTIAN SCHOOL PWS | 126 | 85 | — |
| GUILFORD LAKE ESTATES | 125 | 9 | — |
| Y-INN | 120 | 293 | — |
| W BRANCH ATHLETIC BOOSTER CLUB | 120 | 108 | — |
| HIS BOUNTY ORCHARD & FARM 1 PWS | 116 | 27 | — |