Hard water in Park City, UT
Reported by Jordanelle SSD · September 2025
- UT typical
- 231 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
Park City water measures 166 mg/L (9.7 gpg) of hardness, hard by USGS standards. The number comes from Jordanelle SSD, dated September 2025.
At 166 mg/L, Park City is 65 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 116 mg/L in Summit Park to 231 in Holladay.
What 166 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
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 166 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 × 9.7 gpg = 2,185 grains a day. A 24,000-grain unit regenerates about every 10 days.
EPA record for Park City's water system
No health-based violations since 2016
Serves about 8,875 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 0
- Open now
- 0
EPA lists this system as serving Park City.
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 Park City water hard?
Yes. It measures about 166 mg/L (9.7 grains per gallon), which the USGS classes as hard.
What is the water hardness in Park City in grains per gallon?
About 9.7 gpg. One grain per gallon equals 17.1 mg/L, so 166 mg/L divided by 17.1 gives 9.7.
What size water softener do I need in Park City?
For 3 people using 75 gallons each per day, 9.7 gpg works out to about 2,185 grains a day. A 24,000-grain softener covers that with a regeneration about every 10 days.
Has the Park City water system had EPA violations?
EPA records show no health-based violations for Park City Water System since 2016.
Nearby cities
- Snyderville120 mg/LModerately hard
- Summit Park116 mg/LModerately hard
- Midway204 mg/LVery hard
- Heber196 mg/LVery hard
- Cottonwood Heights214 mg/LVery hard
- Holladay231 mg/LVery hard
- Millcreek231 mg/LVery hard
- Sandy156 mg/LHard
- Murray216 mg/LVery hard
- Midvale161 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, September 15, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.