Water Hardness New Hampshire
Here are the water hardness values for the cities in New Hampshire.
| City | AVG Hardness PPM / mg/L | AVG Hardness Grains per Gallon |
|---|---|---|
| Concord | 16 | 1 |
| Keene | 25 | 1 |
| Lebanon | 19 | 1 |
| Manchester | 19.4 | 1.2 |
| Nashua | 29 | 2 |
| Portsmouth | 101 | 6 |
| Rochester | 25 | 2 |
| Somersworth | 14 | 1 |