Water Hardness Illinois
Here are the water hardness values for the cities in Illinois.
| City | AVG Hardness PPM / mg/L | AVG Hardness Grains per Gallon |
|---|---|---|
| Arlington Heights | 134 | 7.9 |
| Aurora | 130 | 7.7 |
| Aurora | 130 | 7.7 |
| Bolingbrook | 108 | 6.4 |
| Capital | 115 | 6.8 |
| Champaign | 90 | 5.3 |
| Chicagoland | 148 | 8.7 |
| Elgin | 128 | 7.5 |
| Elgin | 128 | 7.5 |
| Evanston | 134 | 7.9 |
| Glen Ellyn | 148 | 8.7 |
| Glenview | 150 | 8.8 |
| Joliet | 17 | 1 |
| Joliet | 17 | 1 |
| Mount Prospect | 110 | 6.5 |
| New Trier | 150 | 8.8 |
| Peoria | 450 | 26.4 |
| Rockford | 22 | 1.3 |
| Rockford | 22 | 1.3 |
| Skokie | 134 | 7.9 |
| Springfield | 115 | 6.8 |
| Thornton | 196 | 11.5 |
| Waukegan | 140 | 8.2 |
| Wayne | 333.8 | 19.6 |
| Wheeling | 134 | 7.9 |