Robinson, TX water hardness

Tap water hardness
31mg/L
1.8gpg
SoftReports range 11–31

Reported by City of Robinson · June 2022

TX typical
112 mg/L
EPA health violations since 2016
1
Data
Utility report

The water in Robinson carries roughly 31 mg/L of dissolved calcium and magnesium, or 1.8 grains per gallon. That is soft water. The number comes from City of Robinson, dated June 2022. Reports for this system disagree, with values from 11 to 31 mg/L.

Robinson on the hardness scale, with nearby cities
060120180240300360+TX typical 112Lacy-Lakeview: 7 mg/LLacy-Lakeview 7McGregor: 12 mg/LMcGregor 12Hillsboro: 24 mg/LHillsboro 24Woodway: 103 mg/LWoodway 103Waco: 105 mg/LWaco 105Gatesville: 112 mg/LGatesville 112Temple: 125 mg/LTemple 125Belton: 133 mg/LBelton 133Cameron: 146 mg/LCameron 146Harker Heights: 285 mg/LHarker Heights 285Robinson 31mg/L as calcium carbonate060120180240300360+TX 112Lacy-Lakeview: 7 mg/LLacy-Lakev. 7McGregor: 12 mg/LMcGregor 12Woodway: 103 mg/LWoodway 103Waco: 105 mg/LWaco 105Temple: 125 mg/LTemple 125Belton: 133 mg/LBelton 13331 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Robinson sits 81 mg/L below the typical Texas figure of 112. Of the 10 nearest cities we track, 3 have softer water and 7 have harder. The range nearby runs from 7 mg/L in Lacy-Lakeview to 285 in Harker Heights.

What 31 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

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

Nothing, as far as hardness goes. At 31 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for Robinson's water system

City of Robinson · PWSID TX1550010

1 health-based violation since 2016

Serves about 11,900 people from surface water.

Health-based
1
Monitoring or reporting
1
Open now
0
20162017201820192020202120222023202420252026Total trihalomethanes (TTHM)'16'18'20'22'24'26Total trihalomethanes (TTHM)
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Total trihalomethanes (TTHM)a disinfection byproduct12018Resolved

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 Robinson water hard?

No. It measures about 31 mg/L (1.8 grains per gallon), which the USGS classes as soft.

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

About 1.8 gpg. One grain per gallon equals 17.1 mg/L, so 31 mg/L divided by 17.1 gives 1.8.

Has the Robinson water system had EPA violations?

EPA records show 1 health-based violation for City of Robinson since 2016, involving Total trihalomethanes (TTHM). There were also 1 monitoring or reporting violation, 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 13, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.