Water Hardness in Arkansas (AR)
Arkansas has an average water hardness of 55 ppm (3.2 grains per gallon), which is classified as Soft . Arkansas 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 Little Rock to 85 ppm in Jonesboro.
Water Hardness by City in Arkansas
The table below shows water hardness data for 8 cities in Arkansas, 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 |
|---|---|---|---|---|---|---|---|
| Jonesboro | 85 ppm | 5 gpg | Slightly Hard | Ground | 7.5 | 130 | City Water and Light |
| Rogers | 75 ppm | 4.4 gpg | Slightly Hard | Surface | 7.3 | 115 | Beaver Water District |
| Springdale | 70 ppm | 4.1 gpg | Slightly Hard | Mixed | 7.3 | 110 | Springdale Water Utilities |
| Fayetteville | 65 ppm | 3.8 gpg | Slightly Hard | Surface | 7.4 | 95 | Beaver Water District |
| Conway | 55 ppm | 3.2 gpg | Soft | Surface | 7.2 | 82 | Conway Corporation |
| Pine Bluff | 45 ppm | 2.6 gpg | Soft | Ground | 7.1 | 70 | Pine Bluff Water Utilities |
| Fort Smith | 28 ppm | 1.6 gpg | Soft | Surface | 7 | 50 | Fort Smith Utility Department |
| Little Rock | 22 ppm | 1.3 gpg | Soft | Surface | 7.1 | 42 | Central Arkansas Water |
Understanding Water Hardness in Arkansas
Water Sources in Arkansas
The majority of cities in Arkansas 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 Arkansas
Water hardness in Arkansas ranges from 22 ppm in Little Rock to 85 ppm in Jonesboro — a difference of 63 ppm. This variation means that treatment recommendations differ significantly between cities. Even the hardest water in Arkansas 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, Little Rock enjoys naturally soft water that needs no treatment at all — an advantage that saves residents money on both equipment and ongoing maintenance.
How Arkansas Compares to Other States
Below is a comparison of Arkansas 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 |
|---|---|---|---|
| Arkansas (AR) | 55 ppm | Soft | 8 |
| North Carolina (NC) | 60 ppm | Soft | 9 |
| South Carolina (SC) | 50 ppm | Soft | 8 |
| Alaska (AK) | 65 ppm | Slightly Hard | 7 |
| New York (NY) | 65 ppm | Slightly Hard | 10 |
| Hawaii (HI) | 40 ppm | Soft | 8 |
Find Your City's Water Hardness
Use our water hardness lookup tool to find your specific city in Arkansas, 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.