Water Hardness Hawaii
Here are the water hardness values for the cities in Hawaii.
| City | Hardness in mg/L (PPM) | Hardness in GPG |
| Hilo | 17 | 1 |
| Honolulu | 34 | 2 |
| Kaanapali | 17 | 1 |
| Kailua | 22 | 1 |
| Maui | 110 | 6 |
| Pearl City | 32 | 2 |
| Waikola | 10 | 1 |
Here are the water hardness values for the cities in Hawaii.
| City | Hardness in mg/L (PPM) | Hardness in GPG |
| Hilo | 17 | 1 |
| Honolulu | 34 | 2 |
| Kaanapali | 17 | 1 |
| Kailua | 22 | 1 |
| Maui | 110 | 6 |
| Pearl City | 32 | 2 |
| Waikola | 10 | 1 |