Water Safety Rankings by State — 2026
The United States has a national average Home Safety Score of 67/100 (grade: C) across 41,344 ZIP codes in 51 states and territories. This ranking compares water quality, lead exposure risk, radon levels, and flood history at the ZIP code level using EPA, FEMA, and Census data sources.
National Grade Distribution
| Grade | ZIP Codes | Percentage |
|---|---|---|
| 🟢 A | 5,723 | 14% |
| 🟡 B | 12,014 | 29% |
| 🟠 C | 13,554 | 33% |
| 🔴 D | 9,438 | 23% |
| ⛔ F | 615 | 1% |
State Rankings
| Rank | State | Avg Score | Grade | ZIP Codes | A+B % | Violations % |
|---|---|---|---|---|---|---|
| 1 | Texas | 82 | B | 2,649 | 81% | 79% |
| 2 | Delaware | 81 | B | 97 | 89% | 68% |
| 3 | Mississippi | 81 | B | 532 | 80% | 79% |
| 4 | Nevada | 81 | B | 254 | 77% | 75% |
| 5 | Hawaii | 79 | B | 137 | 77% | 7% |
| 6 | Oklahoma | 79 | B | 771 | 67% | 82% |
| 7 | Oregon | 78 | B | 482 | 78% | 72% |
| 8 | South Carolina | 78 | B | 534 | 69% | 41% |
| 9 | Washington | 78 | B | 726 | 69% | 60% |
| 10 | Arkansas | 76 | B | 706 | 66% | 36% |
| 11 | Alaska | 75 | B | 274 | 64% | 76% |
| 12 | Georgia | 75 | B | 964 | 62% | 64% |
| 13 | Michigan | 74 | B | 1,167 | 64% | 53% |
| 14 | Alabama | 73 | B | 819 | 62% | 53% |
| 15 | California | 73 | B | 2,630 | 63% | 55% |
| 16 | Florida | 73 | B | 1,484 | 60% | 84% |
| 17 | North Carolina | 73 | B | 1,085 | 61% | 65% |
| 18 | Utah | 72 | B | 347 | 67% | 55% |
| 19 | Louisiana | 71 | B | 723 | 57% | 56% |
| 20 | Vermont | 71 | B | 308 | 55% | 51% |
| 21 | Missouri | 69 | C | 1,161 | 50% | 54% |
| 22 | Tennessee | 69 | C | 787 | 38% | 43% |
| 23 | District of Columbia | 68 | C | 286 | 6% | 96% |
| 24 | Idaho | 66 | C | 324 | 44% | 69% |
| 25 | Massachusetts | 66 | C | 695 | 40% | 45% |
| 26 | Virginia | 66 | C | 1,228 | 37% | 32% |
| 27 | Wisconsin | 66 | C | 898 | 40% | 64% |
| 28 | Connecticut | 65 | C | 433 | 30% | 59% |
| 29 | Nebraska | 65 | C | 621 | 32% | 46% |
| 30 | Arizona | 64 | C | 553 | 40% | 83% |
| 31 | Kansas | 64 | C | 749 | 33% | 67% |
| 32 | New Hampshire | 64 | C | 282 | 47% | 52% |
| 33 | West Virginia | 64 | C | 855 | 31% | 42% |
| 34 | Minnesota | 62 | C | 1,009 | 22% | 35% |
| 35 | New Mexico | 62 | C | 428 | 35% | 72% |
| 36 | Illinois | 61 | C | 1,583 | 28% | 69% |
| 37 | Kentucky | 61 | C | 947 | 19% | 17% |
| 38 | Maryland | 61 | C | 615 | 21% | 32% |
| 39 | New York | 61 | C | 2,186 | 30% | 53% |
| 40 | Rhode Island | 61 | C | 90 | 24% | 58% |
| 41 | Colorado | 60 | C | 658 | 9% | 74% |
| 42 | Indiana | 60 | C | 980 | 22% | 64% |
| 43 | Ohio | 60 | C | 1,435 | 22% | 53% |
| 44 | South Dakota | 60 | C | 392 | 21% | 35% |
| 45 | Iowa | 59 | C | 1,058 | 12% | 45% |
| 46 | New Jersey | 58 | C | 726 | 20% | 40% |
| 47 | Maine | 57 | C | 485 | 13% | 43% |
| 48 | North Dakota | 56 | C | 407 | 12% | 29% |
| 49 | Montana | 55 | C | 405 | 12% | 52% |
| 50 | Pennsylvania | 55 | C | 2,184 | 11% | 48% |
| 51 | Wyoming | 55 | C | 195 | 8% | 58% |
How Rankings Are Calculated
Each ZIP code receives a Home Safety Score (0–100) based on four data dimensions: EPA water violation history, lead exposure risk, county-level radon classification, and FEMA flood claim records. State averages are computed from all ZIP codes within that state. Rankings are updated as new EPA SDWIS data becomes available.
Explore
2026 Annual Rankings
Comprehensive rankings updated for 2026 across 13 safety dimensions.
Home Safety2026
Overall safety combining water, lead, radon, flood
Water Safety2026
EPA violations and drinking water quality
Lead Risk2026
Lead levels exceeding EPA action thresholds
PFAS Contamination2026
Forever chemicals detected in water supply
Flood Risk2026
FEMA flood claims and insurance history
Air Quality2026
AQI and particulate matter exposure
Mold Risk2026
Humidity, housing age, and flood-driven mold probability
Wildfire Risk2026
NRI wildfire risk scores by ZIP
Earthquake Risk2026
Seismic hazard zones and risk indices
Infrastructure Risk2026
Pipe age, system failures, aging infrastructure
CO & Gas Safety2026
Carbon monoxide and natural gas risk factors
School Safety2026
Environmental health near schools
Superfund Proximity2026
Distance to EPA Superfund cleanup sites
Rankings by Metric
Focused rankings for specific risk factors and safety metrics.
💧 Water Quality
🌱 Environment
🏫 School Safety
Rankings by State
See how your state compares across all safety dimensions.
How we build these rankings — data sources, calculation rules, update schedule, and limitations: Rankings Methodology →
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