Water Hardness · Published 2026-07-23 · data as of July 2026
Every State With Genuinely Hard Tap Water (200 PPM+)
14 states sit at or over 200 PPM for water hardness as of July 2026. The full list, ranked.
200 PPM marks the top quartile of the national table for water hardness. 14 states clear that bar as of July 2026 — here they all are, with links to each state's full breakdown.
| State | Hardness (PPM) | vs U.S. benchmark |
|---|---|---|
| Nevada | 300 PPM | +150% |
| Indiana | 298 PPM | +148% |
| Arizona | 280 PPM | +133% |
| Texas | 268 PPM | +123% |
| Utah | 259 PPM | +116% |
| New Mexico | 252 PPM | +110% |
| Kansas | 250 PPM | +108% |
| Wyoming | 210 PPM | +75% |
| Oklahoma | 210 PPM | +75% |
| Nebraska | 210 PPM | +75% |
| Missouri | 200 PPM | +67% |
| Florida | 200 PPM | +67% |
| Delaware | 200 PPM | +67% |
| California | 200 PPM | +67% |
The national benchmark is 120 PPM. See where your state lands on the full ranking, or use the home water purification calculator for a local estimate.
Not sure what's coming out of your tap?
State averages hide huge local swings. A certified home water test kit tells you your exact hardness and what's dissolved in your water — before you spend a dollar on treatment.
Test your water at homeWe may earn a commission if you request quotes through this link. It costs you nothing and never affects the data we publish.