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 |
| Carol Stream | 418 | 24 |
| Champaign | 90 | 5.3 |
| Chicago | 148 | 8 |
| Chicagoland | 148 | 8.7 |
| Cicero | 187 | 11 |
| Columbus | 120 | 7 |
| Crystal Lake | 137 | 8 |
| Danville | 191 | 11 |
| Decatur | 194 | 11 |
| Dekalb | 188 | 11 |
| Des Plaines | 350 | 18 |
| Downers Grove | 288 | 17 |
| East Peoria | 250 | 15 |
| East Saint Louis | 210 | 12 |
| Elgin | 128 | 7.5 |
| Elgin | 128 | 7.5 |
| Elmhurst | 362 | 21 |
| Elmwood Park | 218 | 13 |
| Evanston | 134 | 7.9 |
| Glen Ellyn | 148 | 8.7 |
| Glenview | 150 | 8.8 |
| Granite City | 250 | 15 |
| Joliet | 388 | 23 |
| Kankakee | 196 | 11 |
| Lombard | 344 | 20 |
| Melrose Park | 222 | 12 |
| Moline | 210 | 12 |
| Mount Prospect | 110 | 6.5 |
| Naperville | 288 | 17 |
| New Trier | 150 | 8.8 |
| Oak Lawn | 222 | 13 |
| Oak Park | 212 | 12 |
| Orland Park | 322 | 19 |
| Palatine | 245 | 14 |
| Peoria | 450 | 26.4 |
| Plainfield | 280 | 16 |
| Rockford | 22 | 1.3 |
| Rockford | 22 | 1.3 |
| Romeoville | 395 | 24 |
| 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 |