Hard water in Roma, TX

Tap water hardness
150mg/L
8.8gpg
HardReports range 150–231

Reported by City of Roma · June 2022

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

Roma water measures 150 mg/L (8.8 gpg) of hardness, hard by USGS standards. The number comes from City of Roma, dated June 2022. Reports for this system disagree, with values from 150 to 231 mg/L.

Roma on the hardness scale, with nearby cities
060120180240300360+TX typical 112Rio Grande City: 154 mg/LRio Grande City 154Alton: 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 211Roma 150mg/L as calcium carbonate060120180240300360+TX 112Rio Grande City: 154 mg/LRio Grande. 154La 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 199150 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 150 mg/L, Roma is 38 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 154 mg/L in Rio Grande City to 211 in McAllen.

What 150 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 150 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 Roma

3 people × 75 gallons a day × 8.8 gpg = 1,973 grains a day. A 24,000-grain unit regenerates about every 12 days.

Size it for your household

EPA record for Roma's water system

City of Roma · PWSID TX2140007

5 health-based violations since 2016

Serves about 19,464 people from surface water.

Health-based
5
Monitoring or reporting
57
Open now
1
20162017201820192020202120222023202420252026Surface Water Treatment RuleLead and Copper RuleChlorite'16'18'20'22'24'26Surface Water Treatment RuleLead and Copper RuleChlorite
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Surface Water Treatment Rulefiltration and disinfection22024–2025Resolved
Lead and Copper Rulecorrosion control and lead sampling12024Resolved
Chlorite22023–2024Resolved

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 Roma water hard?

Yes. It measures about 150 mg/L (8.8 grains per gallon), which the USGS classes as hard.

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

About 8.8 gpg. One grain per gallon equals 17.1 mg/L, so 150 mg/L divided by 17.1 gives 8.8.

What size water softener do I need in Roma?

For 3 people using 75 gallons each per day, 8.8 gpg works out to about 1,973 grains a day. A 24,000-grain softener covers that with a regeneration about every 12 days.

Has the Roma water system had EPA violations?

EPA records show 5 health-based violations for City of Roma since 2016, involving Surface Water Treatment Rule, Lead and Copper Rule, Chlorite. There were also 57 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 29, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.