Hard water in Universal City, TX
Reported by City of Universal City · June 2022
- TX typical
- 112 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Universal City carries roughly 121 mg/L of dissolved calcium and magnesium, or 7.1 grains per gallon. That is hard water. The number comes from City of Universal City, dated June 2022. Reports for this system disagree, with values from 121 to 235 mg/L.
At 121 mg/L, Universal City is close to the typical Texas figure of 112 mg/L. Of the 10 nearest cities we track, 1 has softer water and 9 have harder. The range nearby runs from 85 mg/L in Cibolo to 180 in Live Oak.
What 121 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 121 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 × 7.1 gpg = 1,588 grains a day. A 24,000-grain unit regenerates about every 15 days.
EPA record for Universal City's water system
No health-based violations since 2016
Serves about 20,119 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 2
- 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 Universal City water hard?
Yes. It measures about 121 mg/L (7.1 grains per gallon), which the USGS classes as hard.
What is the water hardness in Universal City in grains per gallon?
About 7.1 gpg. One grain per gallon equals 17.1 mg/L, so 121 mg/L divided by 17.1 gives 7.1.
What size water softener do I need in Universal City?
For 3 people using 75 gallons each per day, 7.1 gpg works out to about 1,588 grains a day. A 24,000-grain softener covers that with a regeneration about every 15 days.
Has the Universal City water system had EPA violations?
EPA records show no health-based violations for City of Universal City since 2016. There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Live Oak180 mg/LHard
- Selma180 mg/LHard
- Converse179 mg/LHard
- Schertz176 mg/LHard
- Windcrest180 mg/LHard
- Cibolo85 mg/LModerately hard
- Kirby180 mg/LHard
- Terrell Hills180 mg/LHard
- Alamo Heights180 mg/LHard
- San Antonio179 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, June 27, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.