| 1 | riteway duct cleaning service | | | | | | | 3 | 0.54% |
| 2 | duct cleaning service inc | | | | | | | 2 | 0.36% |
| 3 | rwdcs riteway duct cleaning | | | | | | | 1 | 0.18% |
| 4 | crofton crownsville darnestown davidsonville | | | | | | | 1 | 0.18% |
| 5 | beach easton edgewater eldersburg | | | | | | | 1 | 0.18% |
| 6 | chesapeake beach easton edgewater | | | | | | | 1 | 0.18% |
| 7 | capitol heights dunkirk and | | | | | | | 1 | 0.18% |
| 8 | and capitol heights dunkirk | | | | | | | 1 | 0.18% |
| 9 | heights and capitol heights | | | | | | | 1 | 0.18% |
| 10 | district heights and capitol | | | | | | | 1 | 0.18% |
| 11 | riva district heights and | | | | | | | 1 | 0.18% |
| 12 | and riva district heights | | | | | | | 1 | 0.18% |
| 13 | harwood and riva district | | | | | | | 1 | 0.18% |
| 14 | park columbia crofton crownsville | | | | | | | 1 | 0.18% |
| 15 | columbia crofton crownsville darnestown | | | | | | | 1 | 0.18% |
| 16 | edgewater eldersburg elkton ellicott | | | | | | | 1 | 0.18% |
| 17 | college park columbia crofton | | | | | | | 1 | 0.18% |
| 18 | dickersona adamstown clarksville clinton | | | | | | | 1 | 0.18% |
| 19 | boyds dickersona adamstown clarksville | | | | | | | 1 | 0.18% |
| 20 | clarksburg boyds dickersona adamstown | | | | | | | 1 | 0.18% |
| 21 | chase clarksburg boyds dickersona | | | | | | | 1 | 0.18% |
| 22 | chevy chase clarksburg boyds | | | | | | | 1 | 0.18% |
| 23 | brandywine bryans road catonsville | | | | | | | 1 | 0.18% |
| 24 | heights brandywine bryans road | | | | | | | 1 | 0.18% |
| 25 | braddock heights brandywine bryans | | | | | | | 1 | 0.18% |
| 26 | bowie braddock heights brandywine | | | | | | | 1 | 0.18% |
| 27 | easton edgewater eldersburg elkton | | | | | | | 1 | 0.18% |
| 28 | essex fallston fells point | | | | | | | 1 | 0.18% |
| 29 | eldersburg elkton ellicott city | | | | | | | 1 | 0.18% |
| 30 | hyattsville kensington kettering largo | | | | | | | 1 | 0.18% |
| 31 | north potomac odenton olney | | | | | | | 1 | 0.18% |
| 32 | bethesda north potomac odenton | | | | | | | 1 | 0.18% |
| 33 | north bethesda north potomac | | | | | | | 1 | 0.18% |
| 34 | montgomery village new market | | | | | | | 1 | 0.18% |
| 35 | mitchellville montgomery village new | | | | | | | 1 | 0.18% |
| 36 | millersville mitchellville montgomery village | | | | | | | 1 | 0.18% |
| 37 | marlton millersville mitchellville montgomery | | | | | | | 1 | 0.18% |
| 38 | deale marlton millersville mitchellville | | | | | | | 1 | 0.18% |
| 39 | largo laurel lothian and | | | | | | | 1 | 0.18% |
| 40 | kettering largo laurel lothian | | | | | | | 1 | 0.18% |