Hard water in Gulfport, FL
Reported by Pinellas County Utilities · October 2025
- FL typical
- 120 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Gulfport carries roughly 129 mg/L of dissolved calcium and magnesium, or 7.6 grains per gallon. That is hard water. The number comes from Pinellas County Utilities, dated October 2025.
At 129 mg/L, Gulfport is close to the typical Florida figure of 120 mg/L. None of the 10 nearest cities we track has softer water. The range nearby runs from 129 mg/L in St. Petersburg to 144 in Clearwater.
What 129 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 129 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 × 7.6 gpg = 1,701 grains a day. A 24,000-grain unit regenerates about every 14 days.
EPA record for Gulfport's water system
No health-based violations since 2016
Serves about 12,600 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 6
- Open now
- 0
EPA lists Gulfport Water System as the system serving Gulfport. The hardness figure above comes from a different system's report, which TapWaterData uses for Gulfport.
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 Gulfport water hard?
Yes. It measures about 129 mg/L (7.6 grains per gallon), which the USGS classes as hard.
What is the water hardness in Gulfport in grains per gallon?
About 7.6 gpg. One grain per gallon equals 17.1 mg/L, so 129 mg/L divided by 17.1 gives 7.6.
What size water softener do I need in Gulfport?
For 3 people using 75 gallons each per day, 7.6 gpg works out to about 1,701 grains a day. A 24,000-grain softener covers that with a regeneration about every 14 days.
Has the Gulfport water system had EPA violations?
EPA records show no health-based violations for Gulfport Water System since 2016. There were also 6 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- South Pasadena133 mg/LHard
- Treasure Island133 mg/LHard
- St. Petersburg129 mg/LHard
- Lealman129 mg/LHard
- West Lealman129 mg/LHard
- Pinellas Park133 mg/LHard
- Bardmoor133 mg/LHard
- Seminole133 mg/LHard
- Largo133 mg/LHard
- Clearwater144 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, October 1, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.