How hard is the water in Jupiter, FL?

Tap water hardness
93mg/L
5.5gpg
Moderately hard

Reported by Jupiter Public Water System,town of · May 2025

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

Tap water in Jupiter has about 93 mg/L of hardness, which is 5.5 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from Jupiter Public Water System,town of, dated May 2025.

Jupiter on the hardness scale, with nearby cities
060120180240300360+FL typical 120The Acreage: 61 mg/LThe Acreage 61Westgate: 61 mg/LWestgate 61Royal Palm Beach: 61 mg/LRoyal Palm Beach 61Palm Springs: 61 mg/LPalm Springs 61Greenacres: 61 mg/LGreenacres 61West Palm Beach: 62 mg/LWest Palm Beach 62Palm Beach: 62 mg/LPalm Beach 62Port Salerno: 73 mg/LPort Salerno 73Stuart: 73 mg/LStuart 73Palm Beach Gardens: 75 mg/LPalm Beach Gardens 75Jupiter 93mg/L as calcium carbonate060120180240300360+FL 120The Acreage: 61 mg/LThe Acreage 61Westgate: 61 mg/LWestgate 61West Palm Beach: 62 mg/LWest Palm. 62Palm Beach: 62 mg/LPalm Beach 62Port Salerno: 73 mg/LPort Saler. 73Palm Beach Gardens: 75 mg/LPalm Beach. 7593 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 93 mg/L, Jupiter is 27 mg/L below the typical Florida figure of 120. None of the 10 nearest cities we track has harder water. The range nearby runs from 61 mg/L in The Acreage to 75 in Palm Beach Gardens.

What 93 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 Jupiter

3 people × 75 gallons a day × 5.5 gpg = 1,228 grains a day. A 24,000-grain unit regenerates about every 19 days.

Size it for your household

EPA record for Jupiter's water system

Jupiter Public Water System,town of · PWSID FL4501491

No health-based violations since 2016

Serves about 94,929 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 Jupiter water hard?

Somewhat. It measures about 93 mg/L (5.5 grains per gallon), which the USGS classes as moderately hard.

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

About 5.5 gpg. One grain per gallon equals 17.1 mg/L, so 93 mg/L divided by 17.1 gives 5.5.

What size water softener do I need in Jupiter?

For 3 people using 75 gallons each per day, 5.5 gpg works out to about 1,228 grains a day. A 24,000-grain softener covers that with a regeneration about every 19 days.

Has the Jupiter water system had EPA violations?

EPA records show no health-based violations for Jupiter Public Water System,town of 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, May 16, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.