Water Hardness Oklahoma
Here are the water hardness values for the cities in Oklahoma.
| City | AVG Hardness PPM / mg/L | AVG Hardness Grains per Gallon |
|---|---|---|
| Lawton | 161 | 10 |
| Norman | 150 | 8.8 |
| Oklahoma City | 154 | 9 |
| Stillwater | 122.5 | 7.2 |
| Tulsa | 140 | 8 |
| City | AVG Hardness PPM / mg/L | AVG Hardness Grains per Gallon |
|---|---|---|
| Lawton | 161 | 10 |
| Norman | 150 | 8.8 |
| Oklahoma City | 154 | 9 |
| Stillwater | 122.5 | 7.2 |
| Tulsa | 140 | 8 |