How hard is the water in Lake Dallas, TX?

Tap water hardness
95mg/L
5.5gpg
Moderately hardReports range 95–111

Reported by Lake Cities Municipal Utility Authority · June 2022

TX typical
112 mg/L
EPA health violations since 2016
0
Softener for 3 people
24k grain
Data
Utility report

Tap water in Lake Dallas has about 95 mg/L of hardness, which is 5.5 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from Lake Cities Municipal Utility Authority, dated June 2022. Reports for this system disagree, with values from 95 to 111 mg/L.

Lake Dallas on the hardness scale, with nearby cities
060120180240300360+TX typical 112Lantana: 6 mg/LLantana 6The Colony: 11 mg/LThe Colony 11Highland Village: 26 mg/LHighland Village 26Paloma Creek South: 30 mg/LPaloma Creek South 30Providence Village: 30 mg/LProvidence Village 30Oak Point: 77 mg/LOak Point 77Little Elm: 77 mg/LLittle Elm 77Lewisville: 90 mg/LLewisville 90Flower Mound: 91 mg/LFlower Mound 91Hickory Creek: 93 mg/LHickory Creek 93Lake Dallas 95mg/L as calcium carbonate060120180240300360+TX 112Lantana: 6 mg/LLantana 6The Colony: 11 mg/LThe Colony 11Highland Village: 26 mg/LHighland V. 26Oak Point: 77 mg/LOak Point 77Lewisville: 90 mg/LLewisville 90Hickory Creek: 93 mg/LHickory Cr. 9395 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Lake Dallas sits 17 mg/L below the typical Texas figure of 112. None of the 10 nearest cities we track has harder water. The range nearby runs from 6 mg/L in Lantana to 93 in Hickory Creek.

What 95 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

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

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for Lake Dallas

3 people × 75 gallons a day × 5.5 gpg = 1,246 grains a day. A 24,000-grain unit regenerates about every 19 days.

Size it for your household

EPA record for Lake Dallas's water system

Lake Cities Municipal Utility Authority · PWSID TX0610029

No health-based violations since 2016

Serves about 17,826 people from surface water.

Health-based
0
Monitoring or reporting
3
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 Lake Dallas water hard?

Somewhat. It measures about 95 mg/L (5.5 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Lake Dallas in grains per gallon?

About 5.5 gpg. One grain per gallon equals 17.1 mg/L, so 95 mg/L divided by 17.1 gives 5.5.

What size water softener do I need in Lake Dallas?

For 3 people using 75 gallons each per day, 5.5 gpg works out to about 1,246 grains a day. A 24,000-grain softener covers that with a regeneration about every 19 days.

Has the Lake Dallas water system had EPA violations?

EPA records show no health-based violations for Lake Cities Municipal Utility Authority since 2016. There were also 3 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 342 cities in Texas

Hardness data: TapWaterData US Water Hardness (utility report, June 21, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.