McDonough, GA water hardness

Tap water hardness
28mg/L
1.6gpg
SoftCounty estimate

County estimate from 142 water samples in Henry County · July 2026

GA typical
28 mg/L
EPA health violations since 2016
0
Data
County estimate

Water samples from around McDonough put hardness at about 28 mg/L (1.6 gpg), which would be soft on the USGS scale. Treat this as a rough guide: it is the median of 142 samples taken across Henry County, mostly wells and streams, not a test of McDonough's treated tap water. One more reason for caution: EPA lists McDonough's water system as using surface water, which is often softer than the wells behind the county figure.

McDonough on the hardness scale, with nearby cities
060120180240300360+GA typical 28Conyers: 14 mg/LConyers 14Stonecrest: 18 mg/LStonecrest 18Panthersville: 18 mg/LPanthersville 18Redan: 18 mg/LRedan 18Jackson: 20 mg/LJackson 20Griffin: 22 mg/LGriffin 22Lovejoy: 27 mg/LLovejoy 27Morrow: 27 mg/LMorrow 27Riverdale: 27 mg/LRiverdale 27Fayetteville: 70 mg/LFayetteville 70McDonough 28mg/L as calcium carbonate060120180240300360+GA 28Stonecrest: 18 mg/LStonecrest 18Jackson: 20 mg/LJackson 20Griffin: 22 mg/LGriffin 22Lovejoy: 27 mg/LLovejoy 27Morrow: 27 mg/LMorrow 27Riverdale: 27 mg/LRiverdale 2728 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 28 mg/L, McDonough is close to the typical Georgia figure of 28 mg/L. Of the 10 nearest cities we track, 9 have softer water and 1 has harder. The range nearby runs from 14 mg/L in Conyers to 70 in Fayetteville.

What 28 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 28 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 McDonough's water system

McDonough · PWSID GA1510003

No health-based violations since 2016

Serves about 16,187 people from surface water.

Health-based
0
Monitoring or reporting
1
Open now
0

EPA lists this system as serving McDonough.

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 McDonough water hard?

No. It measures about 28 mg/L (1.6 grains per gallon), which the USGS classes as soft.

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

About 1.6 gpg. One grain per gallon equals 17.1 mg/L, so 28 mg/L divided by 17.1 gives 1.6.

Has the McDonough water system had EPA violations?

EPA records show no health-based violations for McDonough since 2016. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.

Nearby cities

All 85 cities in Georgia

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.