Water Hardness in Isle Of Palms, SC

Q: Do I need a water softener in Isle Of Palms, SC?

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

Q: How many water systems serve Isle Of Palms, SC?

Isle Of Palms, South Carolina has 6 matched water systems across 2 zip codes.

South Carolina · 2 zip codes · 6 matched water systems

29 PPM

1.7 GPG

Soft

0Soft60120180300+

Verified — Annual Water Quality Report

City avg (weighted): 29 PPM

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

System used for this reading

Charleston Water System (Sc1010001)

SC1010001

Water source: surface water

Serves: 327,422

USGS environmental estimate: 47 PPM

Source context

How this city reading is built

This city reading is a weighted rollup across 6 matched water systems and 2 ZIP codes. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis

3 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 Isle Of Palms

These systems are matched to Isle Of Palms, SC. 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
Charleston Water System (Sc1010001) SC1010001	surface water	29 PPM Soft USGS estimate: 47 PPM	327,422	Verified — Annual Water Quality Report
Mt Pleasant Water Works (1010002) SC1010002	surface water	29 PPM Soft USGS estimate: 47 PPM	91,500	Verified — Annual Water Quality Report
St John'S Water (Sc1020002) SC1020002	surface water	29 PPM Soft USGS estimate: 47 PPM	22,592	Verified — Annual Water Quality Report
Isle Of Palms W/S Comm (Sc1010004) SC1010004	surface water	31 PPM Soft	9,530	Estimated — Nearby Data
Dewees Utilities (Sc1050011) SC1050011	groundwater	63 PPM Slightly Hard	55	Estimated — Nearby Data

Charleston Water System (Sc1010001)

SC1010001

Soft

29 PPMsurface water327,422 servedVerified — Annual Water Quality Report

Source water: 47 PPM

Mt Pleasant Water Works (1010002)

SC1010002

Soft

29 PPMsurface water91,500 servedVerified — Annual Water Quality Report

Source water: 47 PPM

St John'S Water (Sc1020002)

SC1020002

Soft

29 PPMsurface water22,592 servedVerified — Annual Water Quality Report

Source water: 47 PPM

Isle Of Palms W/S Comm (Sc1010004)

SC1010004

Soft

31 PPMsurface water9,530 servedEstimated — Nearby Data

Dewees Utilities (Sc1050011)

SC1050011

Slightly Hard

63 PPMgroundwater55 servedEstimated — Nearby Data

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

Zip Codes in Isle Of Palms, SC

2945129 2946629

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 Isle Of Palms, SC.

Submit Your Data

Frequently Asked Questions

How hard is the water in Isle Of Palms, SC?

The citywide weighted average water hardness in Isle Of Palms, SC is 29 PPM (1.7 GPG), classified as soft. This is based on 6 matched water systems. The gauge highlights Charleston Water System (Sc1010001), a verified treated-water system, because individual systems can differ from the citywide average.

Do I need a water softener in Isle Of Palms, SC?

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

Is hard water in Isle Of Palms, 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 Isle Of Palms, SC?

Isle Of Palms, South Carolina is served by 6 matched water systems across 2 zip codes.

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