Hard water in Edinburg, TX

Tap water hardness

156mg/L

9.1gpg

HardReports range 156–244

Reported by North Alamo WSC · November 2024

TX typical: 112 mg/L
EPA health violations since 2016: 5
Softener for 3 people: 24k grain
Data: Utility report

Edinburg water measures 156 mg/L (9.1 gpg) of hardness, hard by USGS standards. The number comes from North Alamo WSC, dated November 2024. Reports for this system disagree, with values from 156 to 244 mg/L.

Edinburg on the hardness scale, with nearby cities

Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Edinburg sits 44 mg/L above the typical Texas figure of 112. None of the 10 nearest cities we track has softer water. The range nearby runs from 159 mg/L in Alton to 211 in McAllen.

What 156 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 156 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.

Softener size for Edinburg

3 people × 75 gallons a day × 9.1 gpg = 2,045 grains a day. A 24,000-grain unit regenerates about every 11 days.

Size it for your household

EPA record for Edinburg's water system

North Alamo WSC · PWSID TX1080029

5 health-based violations since 2016

Serves about 171,195 people from surface water.

Health-based: 5
Monitoring or reporting: 3
Open now: 0

Each dot is one health-based violation, placed at the start of its compliance period.

Contaminant or rule	Violations	Period	Status
Total trihalomethanes (TTHM)a disinfection byproduct	5	2017–2025	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 Edinburg water hard?

Yes. It measures about 156 mg/L (9.1 grains per gallon), which the USGS classes as hard.

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

About 9.1 gpg. One grain per gallon equals 17.1 mg/L, so 156 mg/L divided by 17.1 gives 9.1.

What size water softener do I need in Edinburg?

For 3 people using 75 gallons each per day, 9.1 gpg works out to about 2,045 grains a day. A 24,000-grain softener covers that with a regeneration about every 11 days.

Has the Edinburg water system had EPA violations?

EPA records show 5 health-based violations for North Alamo WSC since 2016, involving Total trihalomethanes (TTHM). There were also 3 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 (utility report, November 25, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.