Hard water in Cottonwood Heights, UT
Reported by Salt Lake City Water System · September 2025
- UT typical
- 231 mg/L
- Softener for 3 people
- 24k grain
- Data
- Utility report
Tap water in Cottonwood Heights has about 214 mg/L of hardness, which is 12.5 grains per gallon. On the USGS scale that counts as very hard. The number comes from Salt Lake City Water System, dated September 2025.
Cottonwood Heights sits 17 mg/L below the typical Utah figure of 231. Of the 10 nearest cities we track, 4 have softer water and 6 have harder. The range nearby runs from 94 mg/L in Draper to 243 in West Jordan.
What 214 mg/L means at home
Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.
Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.
Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.
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
At 214 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 12.5 gpg = 2,815 grains a day. A 24,000-grain unit regenerates about every 8 days.
EPA record for Cottonwood Heights's water system
We could not match Cottonwood Heights 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 Cottonwood Heights water hard?
Yes. It measures about 214 mg/L (12.5 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Cottonwood Heights in grains per gallon?
About 12.5 gpg. One grain per gallon equals 17.1 mg/L, so 214 mg/L divided by 17.1 gives 12.5.
What size water softener do I need in Cottonwood Heights?
For 3 people using 75 gallons each per day, 12.5 gpg works out to about 2,815 grains a day. A 24,000-grain softener covers that with a regeneration about every 8 days.
Nearby cities
- Holladay231 mg/LVery hard
- Sandy156 mg/LHard
- Midvale161 mg/LHard
- Murray216 mg/LVery hard
- Millcreek231 mg/LVery hard
- Taylorsville236 mg/LVery hard
- South Salt Lake231 mg/LVery hard
- Draper94 mg/LModerately hard
- West Jordan243 mg/LVery hard
- South Jordan142 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, September 29, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.