Bentonville, AR water hardness
Reported by Bentonville Water Utilities · June 2025
- AR typical
- 39 mg/L
- EPA health violations since 2016
- 0
- Data
- Utility report
Tap water in Bentonville has about 55 mg/L of hardness, which is 3.2 grains per gallon. On the USGS scale that counts as soft. The number comes from Bentonville Water Utilities, dated June 2025. Reports for this system disagree, with values from 55 to 71 mg/L.
Bentonville sits 16 mg/L above the typical Arkansas figure of 39. None of the 10 nearest cities we track has softer water. The range nearby runs from 55 mg/L in Centerton to 113 in Siloam Springs.
What 55 mg/L means at home
Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.
Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.
Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.
What to do about it
Nothing, as far as hardness goes. At 55 mg/L a softener would have almost nothing to remove.
Carbon filter
If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.
EPA record for Bentonville's water system
No health-based violations since 2016
Serves about 51,250 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 0
- Open now
- 0
Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.
Questions
Is Bentonville water hard?
No. It measures about 55 mg/L (3.2 grains per gallon), which the USGS classes as soft.
What is the water hardness in Bentonville in grains per gallon?
About 3.2 gpg. One grain per gallon equals 17.1 mg/L, so 55 mg/L divided by 17.1 gives 3.2.
Has the Bentonville water system had EPA violations?
EPA records show no health-based violations for Bentonville Water Utilities since 2016.
Nearby cities
- Centerton55 mg/LSoft
- Rogers67 mg/LModerately hard
- Cave Springs62 mg/LModerately hard
- Lowell62 mg/LModerately hard
- Bella Vista107 mg/LModerately hard
- Springdale77 mg/LModerately hard
- Fayetteville77 mg/LModerately hard
- Siloam Springs113 mg/LModerately hard
- Farmington77 mg/LModerately hard
- Prairie Grove68 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (utility report, June 26, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.