How hard is the water in Melbourne, FL?

Tap water hardness
91mg/L
5.3gpg
Moderately hard

Reported by Melbourne, City of · August 2025

FL typical
120 mg/L
EPA health violations since 2016
0
Softener for 3 people
24k grain
Data
Utility report

Tap water in Melbourne has about 91 mg/L of hardness, which is 5.3 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from Melbourne, City of, dated August 2025.

Melbourne on the hardness scale, with nearby cities
060120180240300360+FL typical 120Titusville: 61 mg/LTitusville 61Vero Beach: 64 mg/LVero Beach 64Viera West: 88 mg/LViera West 88Viera East: 88 mg/LViera East 88Cocoa West: 103 mg/LCocoa West 103Cocoa: 103 mg/LCocoa 103Wedgefield: 111 mg/LWedgefield 111West Melbourne: 116 mg/LWest Melbourne 116Palm Bay: 120 mg/LPalm Bay 120Sebastian: 259 mg/LSebastian 259Melbourne 91mg/L as calcium carbonate060120180240300360+FL 120Viera West: 88 mg/LViera West 88Viera East: 88 mg/LViera East 88Cocoa West: 103 mg/LCocoa West 103Cocoa: 103 mg/LCocoa 103West Melbourne: 116 mg/LWest Melbo. 116Palm Bay: 120 mg/LPalm Bay 12091 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Melbourne sits 29 mg/L below the typical Florida figure of 120. Of the 10 nearest cities we track, 4 have softer water and 6 have harder. The range nearby runs from 61 mg/L in Titusville to 259 in Sebastian.

What 91 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

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

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for Melbourne

3 people × 75 gallons a day × 5.3 gpg = 1,202 grains a day. A 24,000-grain unit regenerates about every 19 days.

Size it for your household

EPA record for Melbourne's water system

Melbourne, City of · PWSID FL3051447

No health-based violations since 2016

Serves about 167,753 people from surface water.

Health-based
0
Monitoring or reporting
2
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 Melbourne water hard?

Somewhat. It measures about 91 mg/L (5.3 grains per gallon), which the USGS classes as moderately hard.

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

About 5.3 gpg. One grain per gallon equals 17.1 mg/L, so 91 mg/L divided by 17.1 gives 5.3.

What size water softener do I need in Melbourne?

For 3 people using 75 gallons each per day, 5.3 gpg works out to about 1,202 grains a day. A 24,000-grain softener covers that with a regeneration about every 19 days.

Has the Melbourne water system had EPA violations?

EPA records show no health-based violations for Melbourne, City of since 2016. There were also 2 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, August 6, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.