Hard water in Carolina Beach, NC
Reported by Carolina Beach Water System · June 2025
- NC typical
- 31 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Carolina Beach carries roughly 180 mg/L of dissolved calcium and magnesium, or 10.5 grains per gallon. That is hard water. The number comes from Carolina Beach Water System, dated June 2025.
At 180 mg/L, Carolina Beach is 149 mg/L above the typical North Carolina figure of 31. None of the 10 nearest cities we track has harder water. The range nearby runs from 21 mg/L in Wilmington to 61 in Oak Island.
What 180 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.
What to do about it
At 180 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 10.5 gpg = 2,369 grains a day. A 24,000-grain unit regenerates about every 10 days.
EPA record for Carolina Beach's water system
No health-based violations since 2016
Serves about 6,864 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 264
- Open now
- 0
Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.
Questions
Is Carolina Beach water hard?
Yes. It measures about 180 mg/L (10.5 grains per gallon), which the USGS classes as hard.
What is the water hardness in Carolina Beach in grains per gallon?
About 10.5 gpg. One grain per gallon equals 17.1 mg/L, so 180 mg/L divided by 17.1 gives 10.5.
What size water softener do I need in Carolina Beach?
For 3 people using 75 gallons each per day, 10.5 gpg works out to about 2,369 grains a day. A 24,000-grain softener covers that with a regeneration about every 10 days.
Has the Carolina Beach water system had EPA violations?
EPA records show no health-based violations for Carolina Beach Water System since 2016. There were also 264 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Boiling Spring Lakes49 mg/LSoft
- Wilmington21 mg/LSoft
- St. James49 mg/LSoft
- Leland49 mg/LSoft
- Oak Island61 mg/LModerately hard
- Hampstead27 mg/LSoft
- Shallotte49 mg/LSoft
- Holly Ridge52 mg/LSoft
- Jacksonville52 mg/LSoft
- Half Moon52 mg/LSoft
All 101 cities in North Carolina
Hardness data: TapWaterData US Water Hardness (utility report, June 4, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.