Water Hardness Idaho
Here are the water hardness values for the cities in Idaho.
| City | AVG Hardness PPM / mg/L | AVG Hardness Grains per Gallon |
|---|---|---|
| Blackfoot | 250 - 277 | 14.6 - 16.1 |
| Coeur d'Alene | 127 | 7.5 |
| Idaho Falls | 239.7 | 14.1 |
| Meridian | 136.8 | 8 |
| Nampa | 60.6 | 3.6 |
| Pocatello | 350 | 20.5 |
| Twin Falls | 275 | 16.1 |