How hard is the water in Denton, TX?

Tap water hardness
61mg/L
3.6gpg
Moderately hardReports range 61–90

Reported by City of Denton · January 2025

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

The water in Denton carries roughly 61 mg/L of dissolved calcium and magnesium, or 3.6 grains per gallon. That is moderately hard water. The number comes from City of Denton, dated January 2025. Reports for this system disagree, with values from 61 to 90 mg/L.

Denton on the hardness scale, with nearby cities
060120180240300360+TX typical 112Lantana: 6 mg/LLantana 6Sanger: 12 mg/LSanger 12Highland Village: 26 mg/LHighland Village 26Aubrey: 28 mg/LAubrey 28Providence Village: 30 mg/LProvidence Village 30Paloma Creek South: 30 mg/LPaloma Creek South 30Krum: 63 mg/LKrum 63Oak Point: 77 mg/LOak Point 77Hickory Creek: 93 mg/LHickory Creek 93Lake Dallas: 95 mg/LLake Dallas 95Denton 61mg/L as calcium carbonate060120180240300360+TX 112Lantana: 6 mg/LLantana 6Highland Village: 26 mg/LHighland V. 26Krum: 63 mg/LKrum 63Oak Point: 77 mg/LOak Point 77Hickory Creek: 93 mg/LHickory Cr. 93Lake Dallas: 95 mg/LLake Dallas 9561 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 61 mg/L, Denton is 51 mg/L below the typical Texas figure of 112. Of the 10 nearest cities we track, 6 have softer water and 4 have harder. The range nearby runs from 6 mg/L in Lantana to 95 in Lake Dallas.

What 61 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 Denton

3 people × 75 gallons a day × 3.6 gpg = 801 grains a day. A 24,000-grain unit regenerates about every 29 days.

Size it for your household

EPA record for Denton's water system

City of Denton · PWSID TX0610002

No health-based violations since 2016

Serves about 150,037 people from surface water.

Health-based
0
Monitoring or reporting
1
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 Denton water hard?

Somewhat. It measures about 61 mg/L (3.6 grains per gallon), which the USGS classes as moderately hard.

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

About 3.6 gpg. One grain per gallon equals 17.1 mg/L, so 61 mg/L divided by 17.1 gives 3.6.

What size water softener do I need in Denton?

For 3 people using 75 gallons each per day, 3.6 gpg works out to about 801 grains a day. A 24,000-grain softener covers that with a regeneration about every 29 days.

Has the Denton water system had EPA violations?

EPA records show no health-based violations for City of Denton since 2016. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.

Nearby cities

All 342 cities in Texas

Hardness data: TapWaterData US Water Hardness (utility report, January 6, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.