How hard is the water in Siloam Springs, AR?

Tap water hardness
113mg/L
6.6gpg
Moderately hard

Calculated from the utility's calcium and magnesium results · January 2023

AR typical
39 mg/L
Softener for 3 people
24k grain
Data
Calculated from utility data

Tap water in Siloam Springs has about 113 mg/L of hardness, which is 6.6 grains per gallon. On the USGS scale that counts as moderately hard. TapWaterData worked it out from the calcium and magnesium levels the local utility reports (January 2023).

Siloam Springs on the hardness scale, with nearby cities
060120180240300360+AR typical 39Centerton: 55 mg/LCenterton 55Bentonville: 55 mg/LBentonville 55Cave Springs: 62 mg/LCave Springs 62Lowell: 62 mg/LLowell 62Rogers: 67 mg/LRogers 67Prairie Grove: 68 mg/LPrairie Grove 68Farmington: 77 mg/LFarmington 77Springdale: 77 mg/LSpringdale 77Fayetteville: 77 mg/LFayetteville 77Bella Vista: 107 mg/LBella Vista 107Siloam Springs 113mg/L as calcium carbonate060120180240300360+AR 39Centerton: 55 mg/LCenterton 55Bentonville: 55 mg/LBentonville 55Cave Springs: 62 mg/LCave Sprin. 62Prairie Grove: 68 mg/LPrairie Gr. 68Farmington: 77 mg/LFarmington 77Springdale: 77 mg/LSpringdale 77113 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 113 mg/L, Siloam Springs is 74 mg/L above the typical Arkansas figure of 39. None of the 10 nearest cities we track has harder water. The range nearby runs from 55 mg/L in Centerton to 107 in Bella Vista.

What 113 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

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

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for Siloam Springs

3 people × 75 gallons a day × 6.6 gpg = 1,485 grains a day. A 24,000-grain unit regenerates about every 16 days.

Size it for your household

EPA record for Siloam Springs's water system

We could not match Siloam Springs to a community water system in EPA's records. Your water bill or the yearly Consumer Confidence Report names the system and its ID.

Questions

Is Siloam Springs water hard?

Somewhat. It measures about 113 mg/L (6.6 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Siloam Springs in grains per gallon?

About 6.6 gpg. One grain per gallon equals 17.1 mg/L, so 113 mg/L divided by 17.1 gives 6.6.

What size water softener do I need in Siloam Springs?

For 3 people using 75 gallons each per day, 6.6 gpg works out to about 1,485 grains a day. A 24,000-grain softener covers that with a regeneration about every 16 days.

Nearby cities

All 46 cities in Arkansas

Hardness data: TapWaterData US Water Hardness (calculated from utility data, January 27, 2023), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.