Hard water in Rio Grande City, TX

Tap water hardness
154mg/L
9.0gpg
HardReports range 154–249

Reported by City of Rio Grande City · June 2022

TX typical
112 mg/L
EPA health violations since 2016
2
Softener for 3 people
24k grain
Data
Utility report

Rio Grande City water measures 154 mg/L (9.0 gpg) of hardness, hard by USGS standards. The number comes from City of Rio Grande City, dated June 2022. Reports for this system disagree, with values from 154 to 249 mg/L.

Rio Grande City on the hardness scale, with nearby cities
060120180240300360+TX typical 112Roma: 150 mg/LRoma 150Alton: 159 mg/LAlton 159Mission: 177 mg/LMission 177La Joya: 179 mg/LLa Joya 179La Homa: 185 mg/LLa Homa 185Palmview: 198 mg/LPalmview 198Salida del Sol Estates: 199 mg/LSalida del Sol Estates 199Penitas: 199 mg/LPenitas 199Doffing: 199 mg/LDoffing 199McAllen: 211 mg/LMcAllen 211Rio Grande City 154mg/L as calcium carbonate060120180240300360+TX 112Roma: 150 mg/LRoma 150La Joya: 179 mg/LLa Joya 179Palmview: 198 mg/LPalmview 198Salida del Sol Estates: 199 mg/LSalida del. 199Penitas: 199 mg/LPenitas 199Doffing: 199 mg/LDoffing 199154 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Rio Grande City sits 42 mg/L above the typical Texas figure of 112. Of the 10 nearest cities we track, 1 has softer water and 9 have harder. The range nearby runs from 150 mg/L in Roma to 211 in McAllen.

What 154 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 154 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 Rio Grande City

3 people × 75 gallons a day × 9.0 gpg = 2,030 grains a day. A 24,000-grain unit regenerates about every 11 days.

Size it for your household

EPA record for Rio Grande City's water system

City of Rio Grande City · PWSID TX2140018

2 health-based violations since 2016

Serves about 18,912 people from surface water.

Health-based
2
Monitoring or reporting
31
Open now
1
20162017201820192020202120222023202420252026Surface Water Treatment Rule'16'18'20'22'24'26Surface Water Treatment Rule
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Surface Water Treatment Rulefiltration and disinfection22023Resolved

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 Rio Grande City water hard?

Yes. It measures about 154 mg/L (9.0 grains per gallon), which the USGS classes as hard.

What is the water hardness in Rio Grande City in grains per gallon?

About 9.0 gpg. One grain per gallon equals 17.1 mg/L, so 154 mg/L divided by 17.1 gives 9.0.

What size water softener do I need in Rio Grande City?

For 3 people using 75 gallons each per day, 9.0 gpg works out to about 2,030 grains a day. A 24,000-grain softener covers that with a regeneration about every 11 days.

Has the Rio Grande City water system had EPA violations?

EPA records show 2 health-based violations for City of Rio Grande City since 2016, involving Surface Water Treatment Rule. There were also 31 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, June 28, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.