Smyrna, GA water hardness

Tap water hardness
40mg/L
2.3gpg
Soft

Reported by Cobb County · September 2025

GA typical
28 mg/L
EPA health violations since 2016
0
Data
Utility report

Tap water in Smyrna has about 40 mg/L of hardness, which is 2.3 grains per gallon. On the USGS scale that counts as soft. The number comes from Cobb County, dated September 2025.

Smyrna on the hardness scale, with nearby cities
060120180240300360+GA typical 28North Druid Hills: 18 mg/LNorth Druid Hills 18Druid Hills: 18 mg/LDruid Hills 18Atlanta: 24 mg/LAtlanta 24Sandy Springs: 28 mg/LSandy Springs 28Vinings: 40 mg/LVinings 40Fair Oaks: 40 mg/LFair Oaks 40Mableton: 40 mg/LMableton 40Marietta: 40 mg/LMarietta 40Austell: 40 mg/LAustell 40Kennesaw: 40 mg/LKennesaw 40Smyrna 40mg/L as calcium carbonate060120180240300360+GA 28Atlanta: 24 mg/LAtlanta 24Vinings: 40 mg/LVinings 40Fair Oaks: 40 mg/LFair Oaks 40Mableton: 40 mg/LMableton 40Marietta: 40 mg/LMarietta 40Austell: 40 mg/LAustell 4040 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Smyrna sits 12 mg/L above the typical Georgia figure of 28. None of the 10 nearest cities we track has harder water. The range nearby runs from 18 mg/L in North Druid Hills to 40 in Vinings.

What 40 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 40 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 Smyrna's water system

Smyrna · PWSID GA0670007

No health-based violations since 2016

Serves about 40,508 people from surface water.

Health-based
0
Monitoring or reporting
1
Open now
0

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

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 Smyrna water hard?

No. It measures about 40 mg/L (2.3 grains per gallon), which the USGS classes as soft.

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

About 2.3 gpg. One grain per gallon equals 17.1 mg/L, so 40 mg/L divided by 17.1 gives 2.3.

Has the Smyrna water system had EPA violations?

EPA records show no health-based violations for Smyrna 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 (utility report, September 25, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.