Water Hardness in North Carolina (NC)
North Carolina has an average water hardness of 60 ppm (3.5 grains per gallon), which is classified as Soft . North Carolina enjoys naturally soft water that requires no softening treatment. Residents benefit from easy soap lathering, spot-free dishes, and long-lasting plumbing and appliances. Water hardness varies between cities — from 22 ppm in Asheville to 90 ppm in Wilmington.
Water Hardness by City in North Carolina
The table below shows water hardness data for 9 cities in North Carolina, sorted from hardest to softest. Click any city name for detailed information including water source, treatment recommendations, and estimated hard water costs.
| City | Hardness (PPM) | Grains/Gallon | Level | Water Source | pH | TDS | Utility |
|---|---|---|---|---|---|---|---|
| Wilmington | 90 ppm | 5.3 gpg | Slightly Hard | Ground | 7.4 | 140 | Cape Fear Public Utility Authority |
| Fayetteville | 55 ppm | 3.2 gpg | Soft | Surface | 7.1 | 82 | City of Fayetteville Public Works Commission |
| Raleigh | 50 ppm | 2.9 gpg | Soft | Surface | 7.3 | 75 | City of Raleigh Public Utilities |
| Durham | 48 ppm | 2.8 gpg | Soft | Surface | 7.2 | 72 | City of Durham Water Management |
| Charlotte | 44 ppm | 2.6 gpg | Soft | Surface | 7.2 | 65 | Charlotte Water |
| Greensboro | 42 ppm | 2.5 gpg | Soft | Surface | 7.1 | 62 | City of Greensboro Water Resources |
| Winston-Salem | 38 ppm | 2.2 gpg | Soft | Surface | 7.1 | 58 | City of Winston-Salem Utilities |
| Hickory | 35 ppm | 2 gpg | Soft | Surface | 7 | 55 | City of Hickory Public Utilities |
| Asheville | 22 ppm | 1.3 gpg | Soft | Surface | 6.9 | 35 | Asheville Water Resources Department |
Understanding Water Hardness in North Carolina
Water Sources in North Carolina
The majority of cities in North Carolina draw their water from surface sources such as rivers, lakes, and reservoirs. Surface water generally contains fewer dissolved minerals than groundwater, which helps explain the overall hardness profile of the state. Cities that rely on surface water tend to have softer water because the water has less contact time with mineral-bearing rock formations underground.
Hardness Variation Across North Carolina
Water hardness in North Carolina ranges from 22 ppm in Asheville to 90 ppm in Wilmington — a difference of 68 ppm. This variation means that treatment recommendations differ significantly between cities. Even the hardest water in North Carolina is moderate enough that a water softener is optional rather than essential, though homeowners who value spotless dishes and softer-feeling water may still find one worthwhile. Meanwhile, Asheville enjoys naturally soft water that needs no treatment at all — an advantage that saves residents money on both equipment and ongoing maintenance.
How North Carolina Compares to Other States
Below is a comparison of North Carolina with five states that have similar average water hardness levels. Understanding how your state compares can help you gauge whether your water is typical for the region or unusually hard or soft.
| State | Avg Hardness | Level | Cities |
|---|---|---|---|
| North Carolina (NC) | 60 ppm | Soft | 9 |
| Alaska (AK) | 65 ppm | Slightly Hard | 7 |
| Arkansas (AR) | 55 ppm | Soft | 8 |
| New York (NY) | 65 ppm | Slightly Hard | 10 |
| South Carolina (SC) | 50 ppm | Soft | 8 |
| Georgia (GA) | 75 ppm | Slightly Hard | 9 |
Find Your City's Water Hardness
Use our water hardness lookup tool to find your specific city in North Carolina, or browse all 50 states to compare water hardness across the country. If your water is hard, visit our treatment solutions guide to find the right softener or conditioner for your home.