Hardest Water in South Carolina
16 cities ranked by water hardness. Charleston tops the list at 80 PPM.
South Carolina's water hardness varies significantly by city and water source. The state average across our database is 38 PPM, which is relatively soft. Most homes do not need a water softener. 0% of cities we track in South Carolina have hardness above 120 PPM.
Greer has the softest water at just 15 PPM. No softener is needed.
| # | City | PPM | GPG | Level | Softener? |
|---|---|---|---|---|---|
| 1 | Charleston | 80 | 4.7 | Moderately Hard | Optional |
| 2 | Bluffton | 55 | 3.2 | Slightly Hard | No |
| 3 | Myrtle Beach | 50 | 2.9 | Slightly Hard | No |
| 4 | Columbia | 48 | 2.8 | Slightly Hard | No |
| 5 | North Charleston | 47 | 2.7 | Slightly Hard | No |
| 6 | Rock Hill | 44 | 2.6 | Slightly Hard | No |
| 7 | Hilton Head | 42 | 2.5 | Slightly Hard | No |
| 8 | Summerville | 40 | 2.3 | Slightly Hard | No |
| 9 | Goose Creek | 38 | 2.2 | Slightly Hard | No |
| 10 | Mount Pleasant | 35 | 2 | Slightly Hard | No |
| 11 | Greenville | 30 | 1.8 | Slightly Hard | No |
| 12 | Charleston Downtown | 28 | 1.6 | Slightly Hard | No |
| 13 | Spartanburg | 25 | 1.5 | Slightly Hard | No |
| 14 | Taylors | 15 | 0.9 | Soft | No |
| 15 | Clemson | 15 | 0.9 | Soft | No |
| 16 | Greer | 15 | 0.9 | Soft | No |
Frequently Asked Questions
What is the average water hardness in South Carolina?
Across 16 cities in our database, the average water hardness in South Carolina is 38 PPM (2.2 GPG). This ranges from 15 PPM in Greer to 80 PPM in Charleston.
Do I need a water softener in South Carolina?
It depends on your city. 0% of South Carolina cities in our database (0 of 16) have hardness above 120 PPM where a softener provides measurable benefit. Check your specific city above.
Which South Carolina city has the softest water?
Greer has the softest water in South Carolina at 15 PPM (0.9 GPG). No water softener is needed at this level.
What causes hard water in South Carolina?
Hard water in South Carolina 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.