Kannapolis, NC water hardness

Tap water hardness
58mg/L
3.4gpg
SoftCounty estimate

County estimate from 128 water samples in Cabarrus County · July 2026

NC typical
31 mg/L
EPA health violations since 2016
1
Data
County estimate

Water samples from around Kannapolis put hardness at about 58 mg/L (3.4 gpg), which would be soft on the USGS scale. Treat this as a rough guide: it is the median of 128 samples taken across Cabarrus County, mostly wells and streams, not a test of Kannapolis's treated tap water. One more reason for caution: EPA lists Kannapolis's water system as using surface water, which is often softer than the wells behind the county figure.

Kannapolis on the hardness scale, with nearby cities
060120180240300360+NC typical 31Westport: 14 mg/LWestport 14Davidson: 31 mg/LDavidson 31Cornelius: 31 mg/LCornelius 31Huntersville: 31 mg/LHuntersville 31Mint Hill: 31 mg/LMint Hill 31Concord: 34 mg/LConcord 34Midland: 34 mg/LMidland 34Salisbury: 40 mg/LSalisbury 40Harrisburg: 41 mg/LHarrisburg 41Mooresville: 51 mg/LMooresville 51Kannapolis 58mg/L as calcium carbonate060120180240300360+NC 31Davidson: 31 mg/LDavidson 31Cornelius: 31 mg/LCornelius 31Huntersville: 31 mg/LHuntersvil. 31Concord: 34 mg/LConcord 34Harrisburg: 41 mg/LHarrisburg 41Mooresville: 51 mg/LMooresville 5158 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 58 mg/L, Kannapolis is 27 mg/L above the typical North Carolina figure of 31. None of the 10 nearest cities we track has harder water. The range nearby runs from 14 mg/L in Westport to 51 in Mooresville.

What 58 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 58 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 Kannapolis's water system

Kannapolis, City of · PWSID NC0180065

1 health-based violation since 2016

Serves about 56,050 people from surface water.

Health-based
1
Monitoring or reporting
1
Open now
0

EPA lists this system as serving Kannapolis.

20162017201820192020202120222023202420252026Total Coliform Rule'16'18'20'22'24'26Total Coliform Rule
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Total Coliform Rulebacteria12026Resolved

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 Kannapolis water hard?

No. It measures about 58 mg/L (3.4 grains per gallon), which the USGS classes as soft.

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

About 3.4 gpg. One grain per gallon equals 17.1 mg/L, so 58 mg/L divided by 17.1 gives 3.4.

Has the Kannapolis water system had EPA violations?

EPA records show 1 health-based violation for Kannapolis, City of since 2016, involving Total Coliform Rule. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.

Nearby cities

All 101 cities in North Carolina

Hardness data: TapWaterData US Water Hardness (county estimate, July 4, 2026), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.