How hard is the water in Colleyville, TX?

Tap water hardness
61mg/L
3.6gpg
Moderately hard

Reported by City of Colleyville · July 2025

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

The water in Colleyville 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 Colleyville, dated July 2025.

Colleyville on the hardness scale, with nearby cities
060120180240300360+TX typical 112Bedford: 8 mg/LBedford 8Hurst: 35 mg/LHurst 35Trophy Club: 51 mg/LTrophy Club 51Grapevine: 53 mg/LGrapevine 53Irving: 81 mg/LIrving 81Flower Mound: 91 mg/LFlower Mound 91North Richland Hills: 109 mg/LNorth Richland Hills 109Haltom City: 109 mg/LHaltom City 109Keller: 124 mg/LKeller 124Coppell: 143 mg/LCoppell 143Colleyville 61mg/L as calcium carbonate060120180240300360+TX 112Bedford: 8 mg/LBedford 8Hurst: 35 mg/LHurst 35Trophy Club: 51 mg/LTrophy Club 51Grapevine: 53 mg/LGrapevine 53North Richland Hills: 109 mg/LNorth Rich. 109Keller: 124 mg/LKeller 12461 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, Colleyville is 51 mg/L below the typical Texas figure of 112. Of the 10 nearest cities we track, 4 have softer water and 6 have harder. The range nearby runs from 8 mg/L in Bedford to 143 in Coppell.

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 Colleyville

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 Colleyville's water system

City of Colleyville · PWSID TX2200043

No health-based violations since 2016

Serves about 26,599 people from surface water.

Health-based
0
Monitoring or reporting
0
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 Colleyville 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 Colleyville 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 Colleyville?

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 Colleyville water system had EPA violations?

EPA records show no health-based violations for City of Colleyville since 2016.

Nearby cities

All 342 cities in Texas

Hardness data: TapWaterData US Water Hardness (utility report, July 1, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.