Hardest Water in Connecticut
13 cities ranked by water hardness. Waterbury tops the list at 55 PPM.
Connecticut's water hardness varies significantly by city and water source. The state average across our database is 31 PPM, which is relatively soft. Most homes do not need a water softener. 0% of cities we track in Connecticut have hardness above 120 PPM.
Westport has the softest water at just 18 PPM. No softener is needed.
| # | City | PPM | GPG | Level | Softener? |
|---|---|---|---|---|---|
| 1 | Waterbury | 55 | 3.2 | Slightly Hard | No |
| 2 | Danbury | 50 | 2.9 | Slightly Hard | No |
| 3 | Hartford | 48 | 2.8 | Slightly Hard | No |
| 4 | Bridgeport | 41 | 2.4 | Slightly Hard | No |
| 5 | New Haven | 34 | 2 | Slightly Hard | No |
| 6 | Milford | 28 | 1.6 | Slightly Hard | No |
| 7 | Norwalk | 25 | 1.5 | Slightly Hard | No |
| 8 | Stamford | 22 | 1.3 | Slightly Hard | No |
| 9 | Greenwich | 22 | 1.3 | Slightly Hard | No |
| 10 | Meriden | 20 | 1.2 | Slightly Hard | No |
| 11 | Avon | 20 | 1.2 | Slightly Hard | No |
| 12 | West Hartford | 18 | 1.1 | Slightly Hard | No |
| 13 | Westport | 18 | 1.1 | Slightly Hard | No |
Frequently Asked Questions
What is the average water hardness in Connecticut?
Across 13 cities in our database, the average water hardness in Connecticut is 31 PPM (1.8 GPG). This ranges from 18 PPM in Westport to 55 PPM in Waterbury.
Do I need a water softener in Connecticut?
It depends on your city. 0% of Connecticut cities in our database (0 of 13) have hardness above 120 PPM where a softener provides measurable benefit. Check your specific city above.
Which Connecticut city has the softest water?
Westport has the softest water in Connecticut at 18 PPM (1.1 GPG). No water softener is needed at this level.
What causes hard water in Connecticut?
Hard water in Connecticut is caused by dissolved calcium and magnesium from the local geology. Most of the state has favorable geology with granite, metamorphic, or volcanic rock that contributes minimal dissolved minerals.