Water Hardness in Wilmington, NC

Q: Do I need a water softener in Wilmington, NC?

At a citywide weighted average of 40 PPM, Wilmington has relatively soft water. A water softener is generally not necessary.

Q: How many water systems serve Wilmington, NC?

Wilmington, North Carolina has 6 matched water systems across 3 zip codes.

North Carolina · 3 zip codes · 6 matched water systems

40 PPM

2.3 GPG

Soft

0Soft60120180300+

Verified — Annual Water Quality Report

City avg (weighted): 40 PPM

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

System used for this reading

Cfpua-Wilmington

NC0465010

Water source: surface water

Serves: 198,740

USGS environmental estimate: 23 PPM

Source context

How this city reading is built

This city reading is a weighted rollup across 6 matched water systems and 3 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 Wilmington

These systems are matched to Wilmington, NC. 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
Cfpua-Wilmington NC0465010	surface water	40 PPM Soft USGS estimate: 23 PPM	198,740	Verified — Annual Water Quality Report
The Cape Master System NC0465199	groundwater	40 PPM Soft USGS estimate: 56 PPM	11,587	Verified — Annual Water Quality Report
Cfpua - Wrightsville Beach NC0465020	surface water	40 PPM Soft USGS estimate: 23 PPM	5,300	Verified — Annual Water Quality Report
Figure 8 Island NC0465119	groundwater	40 PPM Soft USGS estimate: 185 PPM	999	Verified — Annual Water Quality Report
Silver Bluff Nursing Home NC0144127	groundwater	40 PPM Soft USGS estimate: 185 PPM	300	Verified — Annual Water Quality Report

Cfpua-Wilmington

NC0465010

Soft

40 PPMsurface water198,740 servedVerified — Annual Water Quality Report

Source water: 23 PPM

The Cape Master System

NC0465199

Soft

40 PPMgroundwater11,587 servedVerified — Annual Water Quality Report

Source water: 56 PPM

Cfpua - Wrightsville Beach

NC0465020

Soft

40 PPMsurface water5,300 servedVerified — Annual Water Quality Report

Source water: 23 PPM

Figure 8 Island

NC0465119

Soft

40 PPMgroundwater999 servedVerified — Annual Water Quality Report

Source water: 185 PPM

Silver Bluff Nursing Home

NC0144127

Soft

40 PPMgroundwater300 servedVerified — Annual Water Quality Report

Source water: 185 PPM

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

Zip Codes in Wilmington, NC

2840340 2840940 2841240

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 Wilmington, NC.

Submit Your Data

Frequently Asked Questions

How hard is the water in Wilmington, NC?

The citywide weighted average water hardness in Wilmington, NC is 40 PPM (2.3 GPG), classified as soft. This is based on 6 matched water systems.

Do I need a water softener in Wilmington, NC?

At 40 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Wilmington, NC 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 Wilmington, NC?

Wilmington, North Carolina is served by 6 matched water systems across 3 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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