Naples, FL water hardness

Tap water hardness
60mg/L
3.5gpg
Soft

Reported by Collier County Regional WTP · September 2025

FL typical
120 mg/L
EPA health violations since 2016
0
Data
Utility report

The water in Naples carries roughly 60 mg/L of dissolved calcium and magnesium, or 3.5 grains per gallon. That is soft water. The number comes from Collier County Regional WTP, dated September 2025.

Naples on the hardness scale, with nearby cities
060120180240300360+FL typical 120Fort Myers: 47 mg/LFort Myers 47Pelican Bay: 60 mg/LPelican Bay 60Naples Manor: 60 mg/LNaples Manor 60Golden Gate: 60 mg/LGolden Gate 60Lely Resort: 60 mg/LLely Resort 60Cape Coral: 60 mg/LCape Coral 60Bonita Springs: 69 mg/LBonita Springs 69Estero: 262 mg/LEstero 262Lehigh Acres: 262 mg/LLehigh Acres 262Immokalee: 288 mg/LImmokalee 288Naples 60mg/L as calcium carbonate060120180240300360+FL 120Pelican Bay: 60 mg/LPelican Bay 60Naples Manor: 60 mg/LNaples Man. 60Golden Gate: 60 mg/LGolden Gate 60Lely Resort: 60 mg/LLely Resort 60Bonita Springs: 69 mg/LBonita Spr. 69Estero: 262 mg/LEstero 26260 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 60 mg/L, Naples is 60 mg/L below the typical Florida figure of 120. Of the 10 nearest cities we track, 1 has softer water and 4 have harder. The range nearby runs from 47 mg/L in Fort Myers to 288 in Immokalee.

What 60 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

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

Nothing, as far as hardness goes. At 60 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for Naples's water system

Collier County Regional WTP · PWSID FL5114069

No health-based violations since 2016

Serves about 216,993 people from groundwater.

Health-based
0
Monitoring or reporting
9
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 Naples water hard?

No. It measures about 60 mg/L (3.5 grains per gallon), which the USGS classes as soft.

What is the water hardness in Naples in grains per gallon?

About 3.5 gpg. One grain per gallon equals 17.1 mg/L, so 60 mg/L divided by 17.1 gives 3.5.

Has the Naples water system had EPA violations?

EPA records show no health-based violations for Collier County Regional WTP since 2016. There were also 9 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 214 cities in Florida

Hardness data: TapWaterData US Water Hardness (utility report, September 23, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.