Water Hardness in Summerville, SC

Q: Do I need a water softener in Summerville, SC?

At a citywide weighted average of 29 PPM, Summerville has relatively soft water. A water softener is generally not necessary.

Q: How many water systems serve Summerville, SC?

Summerville, South Carolina has 13 matched water systems across 2 zip codes.

South Carolina · 2 zip codes · 13 matched water systems

29 PPM

1.7 GPG

Soft

0Soft60120180300+

Verified — Annual Water Quality Report

City avg (weighted): 29 PPM

Dataset updated March 9, 202613 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading

Summerville Cpw (Sc1810003)

SC1810003

Water source: surface water

Serves: 81,750

USGS environmental estimate: 18 PPM

Source context

How this city reading is built

This city reading is a weighted rollup across 13 matched water systems and 2 ZIP codes. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis

13 verified treated-water sources

13 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 Summerville

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

13 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
Summerville Cpw (Sc1810003) SC1810003	surface water	29 PPM Soft USGS estimate: 18 PPM	81,750	Verified — Annual Water Quality Report
Dcwa Knightsville (1820001) SC1820001	surface water	29 PPM Soft USGS estimate: 18 PPM	40,141	Verified — Annual Water Quality Report
Dcws Ashley Phosphate (Sc1820008) SC1820008	surface water	29 PPM Soft USGS estimate: 18 PPM	26,076	Verified — Annual Water Quality Report
Lincolnville Town Of (Sc1010007) SC1010007	surface water	29 PPM Soft USGS estimate: 18 PPM	1,980	Verified — Annual Water Quality Report
Dcws/Clay Field Drive (Sc1850014) SC1850014	surface water	29 PPM Soft USGS estimate: 18 PPM	1,648	Verified — Annual Water Quality Report

Summerville Cpw (Sc1810003)

SC1810003

Soft

29 PPMsurface water81,750 servedVerified — Annual Water Quality Report

Source water: 18 PPM

Dcwa Knightsville (1820001)

SC1820001

Soft

29 PPMsurface water40,141 servedVerified — Annual Water Quality Report

Source water: 18 PPM

Dcws Ashley Phosphate (Sc1820008)

SC1820008

Soft

29 PPMsurface water26,076 servedVerified — Annual Water Quality Report

Source water: 18 PPM

Lincolnville Town Of (Sc1010007)

SC1010007

Soft

29 PPMsurface water1,980 servedVerified — Annual Water Quality Report

Source water: 18 PPM

Dcws/Clay Field Drive (Sc1850014)

SC1850014

Soft

29 PPMsurface water1,648 servedVerified — Annual Water Quality Report

Source water: 18 PPM

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

Zip Codes in Summerville, SC

2948329 2948529

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 Summerville, SC.

Submit Your Data

Frequently Asked Questions

How hard is the water in Summerville, SC?

The citywide weighted average water hardness in Summerville, SC is 29 PPM (1.7 GPG), classified as soft. This is based on 13 matched water systems.

Do I need a water softener in Summerville, SC?

At 29 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Summerville, SC 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 Summerville, SC?

Summerville, South Carolina is served by 13 matched water systems across 2 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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