Hard water in DeSoto, TX
Reported by City of Desoto · June 2022
- TX typical
- 112 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
DeSoto water measures 126 mg/L (7.4 gpg) of hardness, hard by USGS standards. The number comes from City of Desoto, dated June 2022.
DeSoto sits 14 mg/L above the typical Texas figure of 112. Of the 10 nearest cities we track, 8 have softer water and 2 have harder. The range nearby runs from 7 mg/L in Glenn Heights to 164 in Duncanville.
What 126 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 126 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 × 7.4 gpg = 1,658 grains a day. A 24,000-grain unit regenerates about every 14 days.
EPA record for DeSoto's water system
No health-based violations since 2016
Serves about 57,999 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 5
- 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 DeSoto water hard?
Yes. It measures about 126 mg/L (7.4 grains per gallon), which the USGS classes as hard.
What is the water hardness in DeSoto in grains per gallon?
About 7.4 gpg. One grain per gallon equals 17.1 mg/L, so 126 mg/L divided by 17.1 gives 7.4.
What size water softener do I need in DeSoto?
For 3 people using 75 gallons each per day, 7.4 gpg works out to about 1,658 grains a day. A 24,000-grain softener covers that with a regeneration about every 14 days.
Has the DeSoto water system had EPA violations?
EPA records show no health-based violations for City of Desoto since 2016. There were also 5 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Glenn Heights7 mg/LSoft
- Duncanville164 mg/LHard
- Lancaster96 mg/LModerately hard
- Cedar Hill16 mg/LSoft
- Red Oak86 mg/LModerately hard
- Grand Prairie138 mg/LHard
- Midlothian41 mg/LSoft
- Waxahachie70 mg/LModerately hard
- Dallas112 mg/LModerately hard
- Mansfield53 mg/LSoft
Hardness data: TapWaterData US Water Hardness (utility report, June 28, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.