U.S. Home Safety Score Coverage Map
Explore Home Safety Score model 4.0.0 for all 50 states plus D.C., aggregated from 41,344 coverage-qualified ZIP codes.
Model 4.0.0 score data: EPA SDWIS, UCMR5 PFAS, EPA radon zones, and annual county AQI. Map updated 2026-08-06. GeoJSON boundaries via PublicaMundi.
State Rankings
All states ranked by average home safety score. Click any state name to view the full report with ZIP-level data.
| # | State | Score | Grade | Violations | ZIPs |
|---|---|---|---|---|---|
| 1 | Pennsylvania | 55 | C | 12,763 | 2,184 |
| 2 | Montana | 55 | C | 2,102 | 405 |
| 3 | Wyoming | 55 | C | 747 | 195 |
| 4 | North Dakota | 56 | C | 395 | 407 |
| 5 | Maine | 57 | C | 1,440 | 485 |
| 6 | New Jersey | 58 | C | 3,591 | 726 |
| 7 | Iowa | 59 | C | 2,974 | 1,058 |
| 8 | Ohio | 60 | C | 2,908 | 1,435 |
| 9 | Indiana | 60 | C | 5,914 | 980 |
| 10 | South Dakota | 60 | C | 379 | 392 |
| 11 | Colorado | 60 | C | 4,570 | 658 |
| 12 | Rhode Island | 61 | C | 462 | 90 |
| 13 | New York | 61 | C | 15,109 | 2,186 |
| 14 | Maryland | 61 | C | 1,135 | 615 |
| 15 | Kentucky | 61 | C | 573 | 947 |
| 16 | Illinois | 61 | C | 7,431 | 1,583 |
| 17 | Minnesota | 62 | C | 946 | 1,009 |
| 18 | New Mexico | 62 | C | 13,426 | 428 |
| 19 | New Hampshire | 64 | C | 809 | 282 |
| 20 | West Virginia | 64 | C | 8,169 | 855 |
| 21 | Kansas | 64 | C | 3,375 | 749 |
| 22 | Arizona | 64 | C | 29,686 | 553 |
| 23 | Connecticut | 65 | C | 3,061 | 433 |
| 24 | Nebraska | 65 | C | 1,153 | 621 |
| 25 | Massachusetts | 66 | C | 893 | 695 |
| 26 | Virginia | 66 | C | 1,610 | 1,228 |
| 27 | Wisconsin | 66 | C | 5,281 | 898 |
| 28 | Idaho | 66 | C | 1,665 | 324 |
| 29 | District of Columbia | 68 | C | 9,042 | 286 |
| 30 | Tennessee | 69 | C | 1,334 | 787 |
| 31 | Missouri | 69 | C | 3,116 | 1,161 |
| 32 | Vermont | 71 | B | 880 | 308 |
| 33 | Louisiana | 71 | B | 5,477 | 723 |
| 34 | Utah | 72 | B | 890 | 347 |
| 35 | North Carolina | 73 | B | 12,821 | 1,085 |
| 36 | Florida | 73 | B | 35,243 | 1,484 |
| 37 | Alabama | 73 | B | 1,571 | 819 |
| 38 | California | 73 | B | 7,292 | 2,630 |
| 39 | Michigan | 74 | B | 2,609 | 1,167 |
| 40 | Georgia | 75 | B | 4,530 | 964 |
| 41 | Alaska | 75 | B | 14,004 | 274 |
| 42 | Arkansas | 76 | B | 1,738 | 706 |
| 43 | South Carolina | 78 | B | 736 | 534 |
| 44 | Oregon | 78 | B | 3,436 | 482 |
| 45 | Washington | 78 | B | 1,630 | 726 |
| 46 | Oklahoma | 79 | B | 10,231 | 771 |
| 47 | Hawaii | 79 | B | 16 | 137 |
| 48 | Delaware | 81 | B | 155 | 97 |
| 49 | Mississippi | 81 | B | 3,537 | 532 |
| 50 | Nevada | 81 | B | 691 | 254 |
| 51 | Texas | 82 | B | 21,910 | 2,649 |
How Home Safety Scores Are Calculated
Home Safety Score model 4.0.0 uses four required inputs across three equal domains. Missing evidence makes the score unavailable:
- Water Quality - EPA violation history from the Safe Drinking Water Information System (SDWIS). Health-based violations weigh more heavily than monitoring/reporting violations. Resolved violations are weighted at 0.25x.
- PFAS MCL screen - UCMR 5 testing receives 100 when no covered PFAS exceeds the federal MCL screen and 0 when an exceedance is observed.
- Radon Risk - EPA radon zone classifications (Zone 1 = highest risk, Zone 3 = lowest risk) mapped by county.
- Annual AQI - EPA AirData county-year median AQI with at least 90 observed days. Missing coverage suppresses the score.
Understanding the Grades
Scores translate to letter grades for quick reference:
- A (85–100)
- B (70–84)
- C (55–69)
- D (40–54)
- F (0–39)
Data Sources
Model 4.0.0 uses EPA SDWIS compliance records, UCMR5 PFAS results, EPA radon zones, and annual county AQI. Every input is required, and each release reports its accepted source period; no fixed quarterly cadence is claimed.
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