Fort Mill, SC water hardness

Tap water hardness
31mg/L
1.8gpg
Soft

Reported by Fort Mill Town of (Sc4610003) · August 2025

SC typical
32 mg/L
EPA health violations since 2016
0
Data
Utility report

Tap water in Fort Mill has about 31 mg/L of hardness, which is 1.8 grains per gallon. On the USGS scale that counts as soft. The number comes from Fort Mill Town of (Sc4610003), dated August 2025.

Fort Mill on the hardness scale, with nearby cities
060120180240300360+SC typical 32Spartanburg: 16 mg/LSpartanburg 16Gaffney: 21 mg/LGaffney 21Tega Cay: 28 mg/LTega Cay 28Rock Hill: 33 mg/LRock Hill 33Blythewood: 37 mg/LBlythewood 37Lake Murray of Richland: 37 mg/LLake Murray of Richland 37Irmo: 37 mg/LIrmo 37Dentsville: 37 mg/LDentsville 37Woodfield: 37 mg/LWoodfield 37St. Andrews: 37 mg/LSt. Andrews 37Fort Mill 31mg/L as calcium carbonate060120180240300360+SC 32Spartanburg: 16 mg/LSpartanburg 16Gaffney: 21 mg/LGaffney 21Tega Cay: 28 mg/LTega Cay 28Rock Hill: 33 mg/LRock Hill 33Blythewood: 37 mg/LBlythewood 37Lake Murray of Richland: 37 mg/LLake Murra. 3731 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 31 mg/L, Fort Mill is close to the typical South Carolina figure of 32 mg/L. Of the 10 nearest cities we track, 3 have softer water and 7 have harder. The range nearby runs from 16 mg/L in Spartanburg to 37 in Blythewood.

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 Fort Mill's water system

Fort Mill Town of (Sc4610003) · PWSID SC4610003

No health-based violations since 2016

Serves about 25,000 people from surface water.

Health-based
0
Monitoring or reporting
2
Open now
0

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 Fort Mill 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 Fort Mill 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 Fort Mill water system had EPA violations?

EPA records show no health-based violations for Fort Mill Town of (Sc4610003) since 2016. There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 58 cities in South Carolina

Hardness data: TapWaterData US Water Hardness (utility report, August 18, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.