Hard water in Jacksonville Beach, FL
Reported by Jacksonville Beach WTP · October 2025
- FL typical
- 120 mg/L
- EPA health violations since 2016
- 1
- Softener for 3 people
- 24k grain
- Data
- Utility report
Jacksonville Beach water measures 234 mg/L (13.7 gpg) of hardness, very hard by USGS standards. The number comes from Jacksonville Beach WTP, dated October 2025.
At 234 mg/L, Jacksonville Beach is 114 mg/L above the typical Florida figure of 120. None of the 10 nearest cities we track has harder water. The range nearby runs from 58 mg/L in Ormond Beach to 211 in St. Augustine.
What 234 mg/L means at home
Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.
Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.
Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.
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 234 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 × 13.7 gpg = 3,078 grains a day. A 24,000-grain unit regenerates about every 7 days.
EPA record for Jacksonville Beach's water system
1 health-based violation since 2016
Serves about 23,352 people from groundwater.
- Health-based
- 1
- Monitoring or reporting
- 2
- Open now
- 0
| Contaminant or rule | Violations | Period | Status |
|---|---|---|---|
| Total trihalomethanes (TTHM)a disinfection byproduct | 1 | 2016 | Resolved |
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 Jacksonville Beach water hard?
Yes. It measures about 234 mg/L (13.7 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Jacksonville Beach in grains per gallon?
About 13.7 gpg. One grain per gallon equals 17.1 mg/L, so 234 mg/L divided by 17.1 gives 13.7.
What size water softener do I need in Jacksonville Beach?
For 3 people using 75 gallons each per day, 13.7 gpg works out to about 3,078 grains a day. A 24,000-grain softener covers that with a regeneration about every 7 days.
Has the Jacksonville Beach water system had EPA violations?
EPA records show 1 health-based violation for Jacksonville Beach WTP since 2016, involving Total trihalomethanes (TTHM). There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Atlantic Beach156 mg/LHard
- Palm Valley149 mg/LHard
- Nocatee189 mg/LVery hard
- Jacksonville189 mg/LVery hard
- Fruit Cove189 mg/LVery hard
- Bellair-Meadowbrook Terrace189 mg/LVery hard
- St. Augustine211 mg/LVery hard
- Palm Coast68 mg/LModerately hard
- Ormond Beach58 mg/LSoft
- Gainesville140 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, October 15, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.