Out of 615 ZIP codes with data in Maryland, these are the lowest-ranked areas for safety score. See also: National Lowest Home Safety Scores in America | All Maryland Rankings
| Statistic | Value |
|---|---|
| ZIP codes ranked | 615 |
| Lowest value | 32/100 |
| Median value | 60/100 |
| State | Maryland |
100 Lowest-Ranked ZIP Codes
| Rank | ZIP Code | City | State | Safety Score | Safety Score |
|---|---|---|---|---|---|
| 1 | 21719 | Cascade | MD | 32/100 | 32/100 |
| 2 | 20859 | Potomac | MD | 33/100 | 33/100 |
| 3 | 20854 | Potomac | MD | 35/100 | 35/100 |
| 4 | 21122 | Pasadena | MD | 35/100 | 35/100 |
| 5 | 20610 | Barstow | MD | 40/100 | 40/100 |
| 6 | 20611 | Bel Alton | MD | 40/100 | 40/100 |
| 7 | 20617 | Bryantown | MD | 40/100 | 40/100 |
| 8 | 20629 | Dowell | MD | 40/100 | 40/100 |
| 9 | 20632 | Faulkner | MD | 40/100 | 40/100 |
| 10 | 20685 | Saint Leonard | MD | 40/100 | 40/100 |
| 11 | 20693 | Welcome | MD | 40/100 | 40/100 |
| 12 | 20704 | Beltsville | MD | 40/100 | 40/100 |
| 13 | 20733 | Churchton | MD | 40/100 | 40/100 |
| 14 | 20737 | Riverdale | MD | 40/100 | 40/100 |
| 15 | 20742 | College Park | MD | 40/100 | 40/100 |
| 16 | 20751 | Deale | MD | 40/100 | 40/100 |
| 17 | 20758 | Friendship | MD | 40/100 | 40/100 |
| 18 | 20768 | Greenbelt | MD | 40/100 | 40/100 |
| 19 | 20771 | Greenbelt | MD | 40/100 | 40/100 |
| 20 | 20782 | Hyattsville | MD | 40/100 | 40/100 |
| 21 | 20787 | Hyattsville | MD | 40/100 | 40/100 |
| 22 | 20788 | Hyattsville | MD | 40/100 | 40/100 |
| 23 | 20825 | Chevy Chase | MD | 40/100 | 40/100 |
| 24 | 20830 | Olney | MD | 40/100 | 40/100 |
| 25 | 20839 | Beallsville | MD | 40/100 | 40/100 |
| 26 | 20847 | Rockville | MD | 40/100 | 40/100 |
| 27 | 20848 | Rockville | MD | 40/100 | 40/100 |
| 28 | 20849 | Rockville | MD | 40/100 | 40/100 |
| 29 | 20857 | Rockville | MD | 40/100 | 40/100 |
| 30 | 20862 | Brinklow | MD | 40/100 | 40/100 |
| 31 | 20868 | Spencerville | MD | 40/100 | 40/100 |
| 32 | 20875 | Germantown | MD | 40/100 | 40/100 |
| 33 | 20880 | Washington Grove | MD | 40/100 | 40/100 |
| 34 | 20883 | Gaithersburg | MD | 40/100 | 40/100 |
| 35 | 20884 | Gaithersburg | MD | 40/100 | 40/100 |
| 36 | 20885 | Gaithersburg | MD | 40/100 | 40/100 |
| 37 | 20891 | Kensington | MD | 40/100 | 40/100 |
| 38 | 20897 | Suburb Maryland Fac | MD | 40/100 | 40/100 |
| 39 | 20898 | Gaithersburg | MD | 40/100 | 40/100 |
| 40 | 20899 | Gaithersburg | MD | 40/100 | 40/100 |
| 41 | 20913 | Takoma Park | MD | 40/100 | 40/100 |
| 42 | 21005 | Aberdeen Proving Ground | MD | 40/100 | 40/100 |
| 43 | 21010 | Gunpowder | MD | 40/100 | 40/100 |
| 44 | 21020 | Boring | MD | 40/100 | 40/100 |
| 45 | 21027 | Chase | MD | 40/100 | 40/100 |
| 46 | 21036 | Dayton | MD | 40/100 | 40/100 |
| 47 | 21085 | Joppa | MD | 40/100 | 40/100 |
| 48 | 21088 | Lineboro | MD | 40/100 | 40/100 |
| 49 | 21130 | Perryman | MD | 40/100 | 40/100 |
| 50 | 21150 | Simpsonville | MD | 40/100 | 40/100 |
| 51 | 21155 | Upperco | MD | 40/100 | 40/100 |
| 52 | 21156 | Upper Falls | MD | 40/100 | 40/100 |
| 53 | 21634 | Fishing Creek | MD | 40/100 | 40/100 |
| 54 | 21669 | Taylors Island | MD | 40/100 | 40/100 |
| 55 | 21715 | Brownsville | MD | 40/100 | 40/100 |
| 56 | 21718 | Burkittsville | MD | 40/100 | 40/100 |
| 57 | 21721 | Chewsville | MD | 40/100 | 40/100 |
| 58 | 21723 | Cooksville | MD | 40/100 | 40/100 |
| 59 | 21733 | Fairplay | MD | 40/100 | 40/100 |
| 60 | 21759 | Ladiesburg | MD | 40/100 | 40/100 |
| 61 | 21762 | Libertytown | MD | 40/100 | 40/100 |
| 62 | 21765 | Lisbon | MD | 40/100 | 40/100 |
| 63 | 21766 | Little Orleans | MD | 40/100 | 40/100 |
| 64 | 21767 | Maugansville | MD | 40/100 | 40/100 |
| 65 | 21770 | Monrovia | MD | 40/100 | 40/100 |
| 66 | 21775 | New Midway | MD | 40/100 | 40/100 |
| 67 | 21777 | Point Of Rocks | MD | 40/100 | 40/100 |
| 68 | 21778 | Rocky Ridge | MD | 40/100 | 40/100 |
| 69 | 21779 | Rohrersville | MD | 40/100 | 40/100 |
| 70 | 21781 | Saint James | MD | 40/100 | 40/100 |
| 71 | 21790 | Tuscarora | MD | 40/100 | 40/100 |
| 72 | 21794 | West Friendship | MD | 40/100 | 40/100 |
| 73 | 20612 | Benedict | MD | 45/100 | 45/100 |
| 74 | 20677 | Port Tobacco | MD | 45/100 | 45/100 |
| 75 | 20688 | Solomons | MD | 45/100 | 45/100 |
| 76 | 20695 | White Plains | MD | 45/100 | 45/100 |
| 77 | 20705 | Beltsville | MD | 45/100 | 45/100 |
| 78 | 20722 | Brentwood | MD | 45/100 | 45/100 |
| 79 | 20740 | College Park | MD | 45/100 | 45/100 |
| 80 | 20764 | Shady Side | MD | 45/100 | 45/100 |
| 81 | 20781 | Hyattsville | MD | 45/100 | 45/100 |
| 82 | 20783 | Hyattsville | MD | 45/100 | 45/100 |
| 83 | 20815 | Chevy Chase | MD | 45/100 | 45/100 |
| 84 | 20818 | Cabin John | MD | 45/100 | 45/100 |
| 85 | 20842 | Dickerson | MD | 45/100 | 45/100 |
| 86 | 20852 | Rockville | MD | 45/100 | 45/100 |
| 87 | 20853 | Rockville | MD | 45/100 | 45/100 |
| 88 | 20874 | Germantown | MD | 45/100 | 45/100 |
| 89 | 20878 | Gaithersburg | MD | 45/100 | 45/100 |
| 90 | 20895 | Kensington | MD | 45/100 | 45/100 |
| 91 | 21037 | Edgewater | MD | 45/100 | 45/100 |
| 92 | 21040 | Edgewood | MD | 45/100 | 45/100 |
| 93 | 21117 | Owings Mills | MD | 45/100 | 45/100 |
| 94 | 21219 | Sparrows Point | MD | 45/100 | 45/100 |
| 95 | 21220 | Middle River | MD | 45/100 | 45/100 |
| 96 | 21222 | Dundalk | MD | 45/100 | 45/100 |
| 97 | 21722 | Clear Spring | MD | 45/100 | 45/100 |
| 98 | 21757 | Keymar | MD | 45/100 | 45/100 |
| 99 | 21758 | Knoxville | MD | 45/100 | 45/100 |
| 100 | 21817 | Crisfield | MD | 45/100 | 45/100 |
Methodology
The Home Safety Score (0-100) combines four data dimensions: EPA water violation history, lead exposure risk from infrastructure and sampling data, county-level EPA radon zone classification, and FEMA flood claim records. A score of 0 indicates maximum risk across all dimensions.
Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-06-04.
Frequently Asked Questions
What does a low Home Safety Score mean?
A score below 40 (grade F) means the ZIP code has multiple overlapping risk factors: frequent EPA violations, elevated lead levels, high radon zone, and/or significant flood history. It reflects cumulative environmental risk, not necessarily current water quality.
Can a ZIP code improve its Safety Score?
Yes. Scores are recalculated as EPA data updates. When water systems resolve violations, replace lead service lines, or address infrastructure issues, scores improve over time.
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