Where does the water in 30070 come from?

Water for zip code 30070 in Lithonia, Georgia is provided by 2 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 30070

Lithonia, Georgia · Newton County

17 PPM

1 GPG

Soft

0Soft60120180300+

High Confidence — USGS Monitoring

Dataset updated March 9, 2026Matched to 2 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 2 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis

1 USGS-backed source

2 matched systems total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.

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 Serving 30070

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

2 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
Newton Co. Water-Sewerage Auth GA2170004	surface water	17 PPM Soft	74,364	High Confidence — USGS Monitoring
Covington GA2170001	surface water	17 PPM Soft	14,391	Estimated — County Avg

Newton Co. Water-Sewerage Auth

GA2170004

Soft

17 PPMsurface water74,364 servedHigh Confidence — USGS Monitoring

Covington

GA2170001

Soft

17 PPMsurface water14,391 servedEstimated — County Avg

Nearby Zip Codes

3001417 3001617 3001312 3005417 3009412 3005517 3025228 3001213 3002514 3005625 3003825 3028129

What This Means For You

Recommendations are based on the displayed ZIP 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 Lithonia, GA (30070).

Submit Your Data

Frequently Asked Questions

Is the water hard in Lithonia, GA (30070)?

The average water hardness in 30070 is 17 PPM (1 GPG), which is classified as soft.

Do I need a water softener in 30070?

At 17 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 30070 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 30070?

Zip code 30070 in Lithonia, Georgia is served by 2 water systems.

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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