Hard water in Cedar Park, TX
Reported by City of Cedar Park · August 2025
- TX typical
- 112 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
Cedar Park water measures 157 mg/L (9.2 gpg) of hardness, hard by USGS standards. The number comes from City of Cedar Park, dated August 2025. Reports for this system disagree, with values from 157 to 182 mg/L.
At 157 mg/L, Cedar Park is 45 mg/L above the typical Texas figure of 112. Of the 10 nearest cities we track, 7 have softer water and 3 have harder. The range nearby runs from 63 mg/L in Wells Branch to 178 in Pflugerville.
What 157 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 157 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 × 9.2 gpg = 2,068 grains a day. A 24,000-grain unit regenerates about every 11 days.
EPA record for Cedar Park's water system
No health-based violations since 2016
Serves about 86,939 people from surface water.
- 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 Cedar Park water hard?
Yes. It measures about 157 mg/L (9.2 grains per gallon), which the USGS classes as hard.
What is the water hardness in Cedar Park in grains per gallon?
About 9.2 gpg. One grain per gallon equals 17.1 mg/L, so 157 mg/L divided by 17.1 gives 9.2.
What size water softener do I need in Cedar Park?
For 3 people using 75 gallons each per day, 9.2 gpg works out to about 2,068 grains a day. A 24,000-grain softener covers that with a regeneration about every 11 days.
Has the Cedar Park water system had EPA violations?
EPA records show no health-based violations for City of Cedar Park since 2016. There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Brushy Creek74 mg/LModerately hard
- Leander162 mg/LHard
- Round Rock169 mg/LHard
- Wells Branch63 mg/LModerately hard
- Steiner Ranch94 mg/LModerately hard
- Liberty Hill150 mg/LHard
- Georgetown148 mg/LHard
- Pflugerville178 mg/LHard
- Lakeway106 mg/LModerately hard
- Austin68 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (utility report, August 18, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.