Water Hardness in Marietta, GA

Q: Do I need a water softener in Marietta, GA?

At a citywide weighted average of 25 PPM, Marietta has relatively soft water. A water softener is generally not necessary.

Q: How many water systems serve Marietta, GA?

Marietta, Georgia has 6 matched water systems across 8 zip codes.

Georgia · 8 zip codes · 6 matched water systems

25 PPM

1.5 GPG

Soft

0Soft60120180300+

Verified — Annual Water Quality Report

City avg (weighted): 25 PPM

Dataset updated March 9, 20266 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading

Cobb County

GA0670003

Water source: surface water

Serves: 695,000

USGS environmental estimate: 34 PPM

Source context

How this city reading is built

This city reading is a weighted rollup across 6 matched water systems and 8 ZIP codes. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis

6 verified treated-water sources

6 matched systems total for this city; treated-water reports are prioritized when available.

Water source profile

Primarily surface water

Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.

Data recency

March 9, 2026

Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems in Marietta

These systems are matched to Marietta, GA. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

6 water systems

PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.

Water System	Source	Hardness	Pop. Served	Data Source
Cobb County GA0670003	surface water	25 PPM Soft USGS estimate: 34 PPM	695,000	Verified — Annual Water Quality Report
Marietta Board Of Lights And Water GA0670005	surface water	25 PPM Soft USGS estimate: 34 PPM	60,100	Verified — Annual Water Quality Report
Smyrna GA0670007	surface water	25 PPM Soft USGS estimate: 34 PPM	40,508	Verified — Annual Water Quality Report
Waterfall Country Club Water System GA2410124	groundwater	25 PPM Soft USGS estimate: 263 PPM	156	Verified — Annual Water Quality Report
Fish Hook Point Subdivision GA1110053	groundwater	25 PPM Soft USGS estimate: 263 PPM	52	Verified — Annual Water Quality Report

Cobb County

GA0670003

Soft

25 PPMsurface water695,000 servedVerified — Annual Water Quality Report

Source water: 34 PPM

Marietta Board Of Lights And Water

GA0670005

Soft

25 PPMsurface water60,100 servedVerified — Annual Water Quality Report

Source water: 34 PPM

Smyrna

GA0670007

Soft

25 PPMsurface water40,508 servedVerified — Annual Water Quality Report

Source water: 34 PPM

Waterfall Country Club Water System

GA2410124

Soft

25 PPMgroundwater156 servedVerified — Annual Water Quality Report

Source water: 263 PPM

Fish Hook Point Subdivision

GA1110053

Soft

25 PPMgroundwater52 servedVerified — Annual Water Quality Report

Source water: 263 PPM

Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Marietta, GA

3000825 3006025 3006225 3006425 3006625 3006725 3006825 3015225

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Your Water Is Soft

Your water hardness is in the soft range. You likely don't need a water softener. Enjoy your naturally soft water!

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Marietta, GA.

Submit Your Data

Frequently Asked Questions

How hard is the water in Marietta, GA?

The citywide weighted average water hardness in Marietta, GA is 25 PPM (1.5 GPG), classified as soft. This is based on 6 matched water systems.

Do I need a water softener in Marietta, GA?

At 25 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Marietta, GA safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve Marietta, GA?

Marietta, Georgia is served by 6 matched water systems across 8 zip codes.

Learn More About Your Water

Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

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How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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