Hard water in San Benito, TX
Reported by Harlingen Water Works System · April 2025
- TX typical
- 112 mg/L
- EPA health violations since 2016
- 1
- Softener for 3 people
- 24k grain
- Data
- Utility report
Tap water in San Benito has about 224 mg/L of hardness, which is 13.1 grains per gallon. On the USGS scale that counts as very hard. The number comes from Harlingen Water Works System, dated April 2025. Reports for this system disagree, with values from 224 to 283 mg/L.
San Benito sits 112 mg/L above the typical Texas figure of 112. Of the 10 nearest cities we track, 9 have softer water and 1 has harder. The range nearby runs from 149 mg/L in La Feria to 228 in Harlingen.
What 224 mg/L means at home
Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.
Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.
Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.
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 224 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 × 13.1 gpg = 2,941 grains a day. A 24,000-grain unit regenerates about every 8 days.
EPA record for San Benito's water system
1 health-based violation since 2016
Serves about 24,250 people from surface water.
- Health-based
- 1
- Monitoring or reporting
- 4
- Open now
- 0
EPA lists City of San Benito as the system serving San Benito. The hardness figure above comes from a different system's report, which TapWaterData uses for San Benito.
| Contaminant or rule | Violations | Period | Status |
|---|---|---|---|
| Surface Water Treatment Rulefiltration and disinfection | 1 | 2016 | Resolved |
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 San Benito water hard?
Yes. It measures about 224 mg/L (13.1 grains per gallon), which the USGS classes as very hard.
What is the water hardness in San Benito in grains per gallon?
About 13.1 gpg. One grain per gallon equals 17.1 mg/L, so 224 mg/L divided by 17.1 gives 13.1.
What size water softener do I need in San Benito?
For 3 people using 75 gallons each per day, 13.1 gpg works out to about 2,941 grains a day. A 24,000-grain softener covers that with a regeneration about every 8 days.
Has the San Benito water system had EPA violations?
EPA records show 1 health-based violation for City of San Benito since 2016, involving Surface Water Treatment Rule. There were also 4 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Harlingen228 mg/LVery hard
- Los Fresnos181 mg/LVery hard
- La Feria149 mg/LHard
- Brownsville211 mg/LVery hard
- Cameron Park217 mg/LVery hard
- Mercedes166 mg/LHard
- Progreso173 mg/LHard
- Mila Doce161 mg/LHard
- Port Isabel210 mg/LVery hard
- Weslaco164 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, April 15, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.