Hard water in Weslaco, TX
Reported by North Alamo WSC · June 2022
- TX typical
- 112 mg/L
- EPA health violations since 2016
- 1
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Weslaco carries roughly 164 mg/L of dissolved calcium and magnesium, or 9.6 grains per gallon. That is hard water. The number comes from North Alamo WSC, dated June 2022. Reports for this system disagree, with values from 164 to 237 mg/L.
At 164 mg/L, Weslaco is 52 mg/L above 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 149 mg/L in La Feria to 216 in Donna.
What 164 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 164 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 × 9.6 gpg = 2,153 grains a day. A 24,000-grain unit regenerates about every 11 days.
EPA record for Weslaco's water system
1 health-based violation since 2016
Serves about 40,033 people from surface water.
- Health-based
- 1
- Monitoring or reporting
- 8
- Open now
- 4
EPA lists City of Weslaco as the system serving Weslaco. The hardness figure above comes from a different system's report, which TapWaterData uses for Weslaco.
| Contaminant or rule | Violations | Period | Status |
|---|---|---|---|
| Lead and Copper Rulecorrosion control and lead sampling | 1 | 2024 | 1 open |
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 Weslaco water hard?
Yes. It measures about 164 mg/L (9.6 grains per gallon), which the USGS classes as hard.
What is the water hardness in Weslaco in grains per gallon?
About 9.6 gpg. One grain per gallon equals 17.1 mg/L, so 164 mg/L divided by 17.1 gives 9.6.
What size water softener do I need in Weslaco?
For 3 people using 75 gallons each per day, 9.6 gpg works out to about 2,153 grains a day. A 24,000-grain softener covers that with a regeneration about every 11 days.
Has the Weslaco water system had EPA violations?
EPA records show 1 health-based violation for City of Weslaco since 2016, involving Lead and Copper Rule. There were also 8 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Donna216 mg/LVery hard
- Mila Doce161 mg/LHard
- Mercedes166 mg/LHard
- Olivarez161 mg/LHard
- Progreso173 mg/LHard
- Alamo166 mg/LHard
- Elsa161 mg/LHard
- La Feria149 mg/LHard
- San Juan162 mg/LHard
- Murillo161 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, June 27, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.