Hard water in Holladay, UT

Tap water hardness
231mg/L
13.5gpg
Very hard

Reported by Salt Lake City Water System · September 2025

UT typical
231 mg/L
Softener for 3 people
24k grain
Data
Utility report

The water in Holladay carries roughly 231 mg/L of dissolved calcium and magnesium, or 13.5 grains per gallon. That is very hard water. The number comes from Salt Lake City Water System, dated September 2025.

Holladay on the hardness scale, with nearby cities
060120180240300360+UT typical 231Sandy: 156 mg/LSandy 156Midvale: 161 mg/LMidvale 161Cottonwood Heights: 214 mg/LCottonwood Heights 214Murray: 216 mg/LMurray 216Millcreek: 231 mg/LMillcreek 231South Salt Lake: 231 mg/LSouth Salt Lake 231Salt Lake City: 231 mg/LSalt Lake City 231Taylorsville: 236 mg/LTaylorsville 236West Valley City: 237 mg/LWest Valley City 237Kearns: 365 mg/LKearns 365Holladay 231mg/L as calcium carbonate060120180240300360+UT 231Sandy: 156 mg/LSandy 156Midvale: 161 mg/LMidvale 161Cottonwood Heights: 214 mg/LCottonwood. 214Murray: 216 mg/LMurray 216Millcreek: 231 mg/LMillcreek 231South Salt Lake: 231 mg/LSouth Salt. 231231 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Holladay sits close to the typical Utah figure of 231 mg/L. Of the 10 nearest cities we track, 4 have softer water and 3 have harder. The range nearby runs from 156 mg/L in Sandy to 365 in Kearns.

What 231 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 231 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.

Softener size for Holladay

3 people × 75 gallons a day × 13.5 gpg = 3,040 grains a day. A 24,000-grain unit regenerates about every 7 days.

Size it for your household

EPA record for Holladay's water system

We could not match Holladay 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 Holladay water hard?

Yes. It measures about 231 mg/L (13.5 grains per gallon), which the USGS classes as very hard.

What is the water hardness in Holladay in grains per gallon?

About 13.5 gpg. One grain per gallon equals 17.1 mg/L, so 231 mg/L divided by 17.1 gives 13.5.

What size water softener do I need in Holladay?

For 3 people using 75 gallons each per day, 13.5 gpg works out to about 3,040 grains a day. A 24,000-grain softener covers that with a regeneration about every 7 days.

Nearby cities

All 55 cities in Utah

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.