Black Mountain, NC water hardness

Tap water hardness
10mg/L
0.6gpg
Soft

Reported by Asheville City of · October 2025

NC typical
31 mg/L
EPA health violations since 2016
1
Data
Utility report

The water in Black Mountain carries roughly 10 mg/L of dissolved calcium and magnesium, or 0.6 grains per gallon. That is soft water. The number comes from Asheville City of, dated October 2025.

Black Mountain on the hardness scale, with nearby cities
060120180240300360+NC typical 31Brevard: 4 mg/LBrevard 4Hendersonville: 5 mg/LHendersonville 5East Flat Rock: 5 mg/LEast Flat Rock 5Etowah: 5 mg/LEtowah 5Fletcher: 8 mg/LFletcher 8Mills River: 8 mg/LMills River 8Swannanoa: 9 mg/LSwannanoa 9Asheville: 9 mg/LAsheville 9Woodfin: 9 mg/LWoodfin 9Morganton: 19 mg/LMorganton 19Black Mountain 10mg/L as calcium carbonate060120180240300360+NC 31Hendersonville: 5 mg/LHendersonv. 5Fletcher: 8 mg/LFletcher 8Mills River: 8 mg/LMills River 8Swannanoa: 9 mg/LSwannanoa 9Asheville: 9 mg/LAsheville 9Woodfin: 9 mg/LWoodfin 910 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Black Mountain sits 21 mg/L below the typical North Carolina figure of 31. Of the 10 nearest cities we track, 9 have softer water and 1 has harder. The range nearby runs from 4 mg/L in Brevard to 19 in Morganton.

What 10 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 10 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 Black Mountain's water system

Black Mountain, Town of · PWSID NC0111020

1 health-based violation since 2016

Serves about 11,976 people from surface water.

Health-based
1
Monitoring or reporting
13
Open now
0

EPA lists Black Mountain, Town of as the system serving Black Mountain. The hardness figure above comes from a different system's report, which TapWaterData uses for Black Mountain.

20162017201820192020202120222023202420252026Lead and Copper Rule'16'18'20'22'24'26Lead and Copper Rule
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Lead and Copper Rulecorrosion control and lead sampling12024Resolved

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 Black Mountain water hard?

No. It measures about 10 mg/L (0.6 grains per gallon), which the USGS classes as soft.

What is the water hardness in Black Mountain in grains per gallon?

About 0.6 gpg. One grain per gallon equals 17.1 mg/L, so 10 mg/L divided by 17.1 gives 0.6.

Has the Black Mountain water system had EPA violations?

EPA records show 1 health-based violation for Black Mountain, Town of since 2016, involving Lead and Copper Rule. There were also 13 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, October 14, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.