Water Hardness Iowa
Here are the water hardness values for the cities in Iowa.
| City | AVG Hardness PPM / mg/L | AVG Hardness Grains per Gallon |
|---|---|---|
| Ames | 164 | 9.6 |
| Cedar Rapids | 120 | 7.1 |
| Council Bluffs | 156 | 9 |
| Davenport | 235 | 13.8 |
| Des Moines | 157 | 9 |
| Iowa City | 305 | 18 |
| Sioux City | 378 | 22 |
| Waterloo | 297 | 17 |