Justin, TX water hardness

Tap water hardness
6mg/L
0.4gpg
Soft

Calculated from the utility's calcium and magnesium results · June 2022

TX typical
112 mg/L
EPA health violations since 2016
0
Data
Calculated from utility data

Tap water in Justin has about 6 mg/L of hardness, which is 0.4 grains per gallon. On the USGS scale that counts as soft. TapWaterData worked it out from the calcium and magnesium levels the local utility reports (June 2022).

Justin on the hardness scale, with nearby cities
060120180240300360+TX typical 112Lantana: 6 mg/LLantana 6Highland Village: 26 mg/LHighland Village 26Briar: 40 mg/LBriar 40Trophy Club: 51 mg/LTrophy Club 51Denton: 61 mg/LDenton 61Colleyville: 61 mg/LColleyville 61Krum: 63 mg/LKrum 63Flower Mound: 91 mg/LFlower Mound 91Hickory Creek: 93 mg/LHickory Creek 93Keller: 124 mg/LKeller 124Justin 6mg/L as calcium carbonate060120180240300360+TX 112Lantana: 6 mg/LLantana 6Trophy Club: 51 mg/LTrophy Club 51Denton: 61 mg/LDenton 61Krum: 63 mg/LKrum 63Flower Mound: 91 mg/LFlower Mou. 91Keller: 124 mg/LKeller 1246 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Justin sits 106 mg/L below the typical Texas figure of 112. None of the 10 nearest cities we track has softer water. The range nearby runs from 6 mg/L in Lantana to 124 in Keller.

What 6 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

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

Nothing, as far as hardness goes. At 6 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for Justin's water system

City of Justin · PWSID TX0610003

No health-based violations since 2016

Serves about 7,537 people from surface water.

Health-based
0
Monitoring or reporting
6
Open now
0

EPA lists this system as serving Justin.

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 Justin water hard?

No. It measures about 6 mg/L (0.4 grains per gallon), which the USGS classes as soft.

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

About 0.4 gpg. One grain per gallon equals 17.1 mg/L, so 6 mg/L divided by 17.1 gives 0.4.

Has the Justin water system had EPA violations?

EPA records show no health-based violations for City of Justin since 2016. There were also 6 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 (calculated from utility data, June 6, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.