| WASHINGTON SUBURBAN SANITARY COMMISSION | 1,900,000 | 2 | Detected |
| CITY OF ROCKVILLE | 52,000 | 220 | Detected |
| TOWN OF POOLESVILLE | 6,005 | 144 | Detected |
| ADVENTIST HEALTHCARE SHADY GROVE MED CTR | 2,100 | 0 | — |
| SUBURBAN HOSPITAL | 1,900 | 0 | — |
| FAIRLAND CROSSING APARTMENTS | 1,248 | 0 | — |
| NATIONAL INSTITUTES OF HEALTH | 1,100 | 0 | — |
| GLENSTONE FOUNDATION | 537 | 6 | — |
| DICKERSON MARKET | 510 | 17 | — |
| DARNESTOWN SWIM AND RAQUET CLUB | 470 | 13 | — |
| THE BARNESVILLE SCHOOL | 440 | 59 | — |
| SMOKEY GLEN FARM - PICNIC PAVILLION | 400 | 17 | — |
| SMOKEY GLEN FARM- GROVE AREA | 400 | 2 | — |
| MONOCACY ELEMENTARY SCHOOL | 351 | 41 | — |
| WHITLEY PARK CONDOMINIUMS | 256 | 0 | — |
| COMUS INN | 256 | 12 | — |
| MONTGOMERY COUNTRY CLUB | 200 | 11 | — |
| OLD ANGLERS INN | 200 | 5 | — |
| LAYTONSVILLE GOLF COURSE- CLUBHOUSE | 200 | 31 | — |
| LITTLE BENNETT GOLF COURSE-CLUBHOUSE | 200 | 19 | — |
| BOYDS PRESB AND ELF SCHOOL,CAMP SUNSHINE | 180 | 13 | — |
| BROOKE GROVE RETIREMENT VILLAGE | 170 | 0 | — |
| BUTLER SCHOOL | 169 | 68 | — |
| MATER AMORIS MONTESSORI SCHOOL | 155 | 31 | — |
| N.I.H. ANIMAL CENTER | 150 | 25 | — |
| T.W. ENTERPRIZE AND TEXS CARRYOUT | 138 | 40 | — |
| GLENVILAH CENTER I [12944 A-E] | 138 | 24 | — |
| RUPPERT LANDSCAPE | 119 | 21 | — |
| WHITES FERRY STORE | 115 | 25 | — |
| EMPIRE CAFE | 105 | 16 | — |
| BRETTON WOODS RECREATION CENTER | 100 | 11 | — |
| POTOMAC SWIM AND TENNIS | 100 | 29 | — |
| SUNSHINE GENERAL STORE | 100 | 115 | — |
| TRI-COUNTY BAPTIST CHURCH | 100 | 13 | — |
| GLENVILAH CENTER II [12948 A-F] | 93 | 101 | — |
| CAMP BENNETT LODGE [UNION MISSION] | 80 | 28 | — |
| CEDAR GROVE BEER AND WINE | 80 | 16 | — |
| ETCHISON COUNTRY STORE | 80 | 32 | — |
| CAMP BENNETT OFFICE/[UNION MISSION] | 80 | 2 | — |
| PLEASANTS EXCAVATION CO., INC. | 75 | 92 | — |
| NEW HOPE PRESBYTERIAN/CLC PRESCHOOL | 71 | 17 | — |
| DENISE BAKERY | 70 | 42 | — |
| MONTGOMERY CO RESOURCE RECOVERY FACILITY | 64 | 7 | — |
| SENECA ACADEMY & THE CIRCLE SCHOOL | 60 | 25 | — |
| C.S.A.A.C. - BROOKEVILLE SCHOOL CAMPUS | 60 | 14 | — |
| GLENVILAH CENTER III [12960- 12964] | 50 | 16 | — |
| ST. MARYS CHURCH | 50 | 1 | — |
| LITTLE BENNETT- DRIVING RANGE | 50 | 24 | — |
| POOLESVILLE PUBLIC GOLF CLUB | 40 | 26 | — |
| DAYSPRING CHURCH - WELLSPRING WELL | 37 | 0 | — |