Unionville, NC water hardness

Tap water hardness
30mg/L
1.7gpg
Soft

Reported by Union County Water System · September 2025

NC typical
31 mg/L
EPA health violations since 2016
2
Data
Utility report

Tap water in Unionville has about 30 mg/L of hardness, which is 1.7 grains per gallon. On the USGS scale that counts as soft. The number comes from Union County Water System, dated September 2025.

Unionville on the hardness scale, with nearby cities
060120180240300360+NC typical 31Indian Trail: 30 mg/LIndian Trail 30Stallings: 30 mg/LStallings 30Wesley Chapel: 30 mg/LWesley Chapel 30Weddington: 30 mg/LWeddington 30Waxhaw: 30 mg/LWaxhaw 30Mint Hill: 31 mg/LMint Hill 31Matthews: 31 mg/LMatthews 31Monroe: 32 mg/LMonroe 32Midland: 34 mg/LMidland 34Harrisburg: 41 mg/LHarrisburg 41Unionville 30mg/L as calcium carbonate060120180240300360+NC 31Indian Trail: 30 mg/LIndian Tra. 30Stallings: 30 mg/LStallings 30Wesley Chapel: 30 mg/LWesley Cha. 30Mint Hill: 31 mg/LMint Hill 31Matthews: 31 mg/LMatthews 31Monroe: 32 mg/LMonroe 3230 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Unionville sits close to the typical North Carolina figure of 31 mg/L. None of the 10 nearest cities we track has softer water. The range nearby runs from 30 mg/L in Indian Trail to 41 in Harrisburg.

What 30 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 30 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 Unionville's water system

Union County Water System · PWSID NC0190413

2 health-based violations since 2016

Serves about 169,685 people from surface water.

Health-based
2
Monitoring or reporting
2
Open now
0

TapWaterData ties Unionville to this system. EPA's service-area records do not name Unionville, so check the utility printed on your water bill.

20162017201820192020202120222023202420252026Total Coliform RuleHaloacetic acids (HAA5)'16'18'20'22'24'26Total Coliform RuleHaloacetic acids (HAA5)
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Total Coliform Rulebacteria12020Resolved
Haloacetic acids (HAA5)a disinfection byproduct12017Resolved

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 Unionville water hard?

No. It measures about 30 mg/L (1.7 grains per gallon), which the USGS classes as soft.

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

About 1.7 gpg. One grain per gallon equals 17.1 mg/L, so 30 mg/L divided by 17.1 gives 1.7.

Has the Unionville water system had EPA violations?

EPA records show 2 health-based violations for Union County Water System since 2016, involving Total Coliform Rule, Haloacetic acids (HAA5). There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 101 cities in North Carolina

Hardness data: TapWaterData US Water Hardness (utility report, September 23, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.