Hardest Water in Rhode Island
7 cities ranked by water hardness. Warwick tops the list at 39 PPM.
Rhode Island's water hardness varies significantly by city and water source. The state average across our database is 27 PPM, which is relatively soft. Most homes do not need a water softener. 0% of cities we track in Rhode Island have hardness above 120 PPM.
Newport has the softest water at just 20 PPM. No softener is needed.
| # | City | PPM | GPG | Level | Softener? |
|---|---|---|---|---|---|
| 1 | Warwick | 39 | 2.3 | Slightly Hard | No |
| 2 | Providence | 33 | 1.9 | Slightly Hard | No |
| 3 | Cranston | 27 | 1.6 | Slightly Hard | No |
| 4 | East Providence | 25 | 1.5 | Slightly Hard | No |
| 5 | Pawtucket | 24 | 1.4 | Slightly Hard | No |
| 6 | Woonsocket | 22 | 1.3 | Slightly Hard | No |
| 7 | Newport | 20 | 1.2 | Slightly Hard | No |
Frequently Asked Questions
What is the average water hardness in Rhode Island?
Across 7 cities in our database, the average water hardness in Rhode Island is 27 PPM (1.6 GPG). This ranges from 20 PPM in Newport to 39 PPM in Warwick.
Do I need a water softener in Rhode Island?
It depends on your city. 0% of Rhode Island cities in our database (0 of 7) have hardness above 120 PPM where a softener provides measurable benefit. Check your specific city above.
Which Rhode Island city has the softest water?
Newport has the softest water in Rhode Island at 20 PPM (1.2 GPG). No water softener is needed at this level.
What causes hard water in Rhode Island?
Hard water in Rhode Island 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.