Water problems · White crust and spots

White crust, spotty glasses, a tired water heater: that's hard water.

Calcium and magnesium dissolved from Florida's limestone come out of your tap and stay behind on everything they dry on. It isn't a health problem. It is a cleaning, appliance and comfort problem.

Manatee County water, 20256–16 gpg106–279 mg/L, from the county's own data

Sarasota County water, 2025About 7 gpgSoftened at the plant to about 120 mg/L

"Very hard" starts at10.5 gpg180 mg/L on the USGS scale

Health riskNoneNo health-based limit for hardness

Where it comes from.

Rain soaks through limestone into the Floridan aquifer and dissolves calcium and magnesium along the way. Manatee County blends that groundwater with Lake Manatee reservoir water; Sarasota County softens part of its supply at the plant. Private wells can be harder still.

Manatee County's 2025 water quality report says lime-softening at the plant removes "a portion of the hardness" from its well water. Only a portion: in 2025, county water still tested from moderately hard to very hard.

Water hardness is measured in grains per gallon (gpg) or mg/L. One grain per gallon is 17.1 mg/L.

Scale costs more than looks. The EPA's WaterSense softener guide says it reduces heat transfer, so water heaters run less efficiently, and that hard water can shorten the life of water heaters, toilet parts and washing machines.

White crustOn faucets, showerheads and the base of fixtures.
Spots and filmOn glasses from the dishwasher and on glass shower doors.
Soap that won't latherYou use more shampoo, soap and detergent for the same result.
A water heater that works harderScale builds up on heating elements and in tankless heat exchangers. Tankless heater manuals typically call for scale protection or regular descaling on hard water.

How hard is your water? Check who sends the bill.

Homes in Bradenton, Lakewood Ranch and Sarasota can be on different utilities, and each treats water differently. Find the name on your water bill. Figures come from each utility's latest report.

Manatee County UtilitiesTotal hardness of 106–279 mg/L (about 6–16 gpg) in 2025 sampling. Well water is partly softened, then blended with treated Lake Manatee water.
City of BradentonTreated Bill Evers Reservoir water blended with aquifer storage and recovery wells. The 2025 report doesn't list hardness, so we measure it at your tap when we install.
Sarasota County Public UtilitiesSoftened to around 120–125 mg/L (about 7 gpg), per the 2025 report. Part of the supply is demineralized at the county's Carlton plant; the rest comes from the Peace River Manasota regional authority and Manatee County.
City of SarasotaUpper Floridan Aquifer well water is treated by reverse osmosis and ion-exchange softening, then blended (2024 report).
Private wellsNo utility report covers your water. Only a test tells you your hardness.

What the numbers mean.

Labs report hardness in mg/L (the same as ppm). Softener makers use grains per gallon. Divide mg/L by 17.1 to convert.

The EPA says water above 120 mg/L (7 gpg) is generally considered hard and may benefit from softening, and softeners are often recommended above 180 mg/L (10 gpg). The scale at right is the U.S. Department of the Interior and Water Quality Association version, as listed by University of Nebraska Extension.

Soft0–17.1 mg/L · 0–1 gpg
Slightly hard17.1–60 mg/L · 1–3.5 gpg
Moderately hard60–120 mg/L · 3.5–7 gpg
Hard120–180 mg/L · 7–10.5 gpg
Very hard180 mg/L and over · 10.5 gpg and over

What fixes it, and what doesn't.

Only removing the minerals fixes the cause. Everything else treats the symptoms.

Ion-exchange softenerThe standard fix. Resin beads trade calcium and magnesium for sodium, and a brine tank of salt recharges the resin. It adds roughly 8 mg/L of sodium for every grain removed.
Salt-free conditionersReduce scale forming in pipes and heaters, but don't remove hardness. Drying water can still leave a fine film or dust, which wipes off more easily than scale.
Carbon filters and fridge filtersGreat for chlorine taste. They don't remove hardness.
Watching sodium?Add reverse osmosis at the kitchen tap. It removes most of the sodium from your drinking water.

How a softener works, minus the sales pitch.

The tall tank holds resin beads loaded with sodium (or potassium). As hard water flows through, calcium and magnesium trade places with it and stick to the beads.

When the beads fill up, the softener regenerates: it rinses them with brine from the salt tank and sends the hardness down the drain. The EPA says a typical softener uses 20 to 70 gallons of water each time. That's why the details here matter.

Regenerates on demand, not a timerA meter or sensor triggers regeneration only when needed. EPA recommends this to save salt and water.
Certified to NSF/ANSI 44Lab-tested for materials, design and performance. EPA's efficiency marks: 5 gallons or less per 1,000 grains removed, and over 3,350 grains per pound of salt.
Sized to your houseBased on your hardness and water use. EPA warns that oversizing wastes water.
Before the water heater, after the hose bibbsEPA recommends softening water before the heater and, where possible, skipping irrigation. NDSU Extension doesn't recommend softened water for lawns or gardens because of the sodium.
On septic?EPA says to check with the septic manufacturer or a local provider first.

Salt-free conditioners, honestly.

Salt-free systems don't remove hardness. University of Nebraska Extension calls them descalers: they change the form of the minerals so less scale sticks. If you go this route, EPA suggests a unit that meets the IAPMO/ANSI Z601 standard for scale reduction devices.

Template-assisted crystallization (TAC)Turns hardness into tiny crystals that don't stick. A fine dust can show up on dishes but wipes away. Iron or manganese may need treating first.
Magnetic devicesThe same guide calls them unproven.
The honest catchFew conclusive studies confirm how well salt-free devices work in homes. If you want the minerals gone, that takes a softener.

Salt, sodium and upkeep.

A softener adds about 8 mg/L of sodium per grain removed, according to NDSU Extension. At the top of Manatee County's 2025 range, about 16 gpg, that's roughly 130 mg/L added to the 13–15 mg/L already in county water.

If you'd rather skip it, NDSU suggests leaving one kitchen tap unsoftened, or add reverse osmosis there. On a sodium-restricted diet? Ask your doctor. Softener pellets also come in potassium.

Use softener pelletsSodium or potassium pellets made for softeners. EPA says to avoid rock, road and table salt.
Keep it about half fullCheck every 4 to 6 weeks. Never let it fall below a quarter.
Watch for salt bridgesSalt level not dropping? Break up the crust with a broom handle, then run a regeneration.
Clean on scheduleEPA says resin needs cleaning yearly and the brine tank every few years, per the manufacturer.

Do you actually need one?

Not always. EPA says softeners aren't needed in every home and suggests one only where hardness is substantial or a water professional, utility or local code recommends it. We agree.

On install day we measure hardness at your kitchen tap, before and after, and show you where it lands on the scale above. If it doesn't call for a softener, we'll tell you.

Under 7 gpg (120 mg/L)Below EPA's "hard" line. You may not need one.
Over 7 gpg with symptomsCrust, spotty glasses and poor lather: softening may help.
Over 10 gpg (180 mg/L)Where EPA says softeners are often recommended.

Common questions.

Is hard water bad for my health?

No. Neither the EPA nor the World Health Organization sets a health-based limit for hardness. The problems are scale, cleaning and appliance wear.

How do I know how hard my water is?

Your utility's annual water quality report gives a range, and we measure your own tap before and after on install day.

Will a softener make my water taste salty?

Not at typical local hardness. Softening adds a small amount of sodium; if you want it out of your drinking water, an under-sink RO system removes most of it.

Do I need a softener if I live in the City of Sarasota?

Maybe not. City of Sarasota water is softened at the treatment plant. Test before you buy.

How hard is Manatee County water?

Manatee County's 2025 data shows total hardness of 106 to 279 mg/L, or about 6 to 16 grains per gallon. City of Bradenton's 2025 report doesn't list hardness, so we measure it at your tap when we install.

Do salt-free conditioners soften water?

No. They don't remove calcium or magnesium. University of Nebraska Extension calls them descalers: they change the minerals' form to reduce scale. Removing hardness takes an ion-exchange softener.

Can I water my lawn with softened water?

It's better not to. NDSU Extension doesn't recommend softened water for lawns, gardens or houseplants because of its sodium. EPA suggests installing the softener after the line branches off to hose bibbs and irrigation where possible.

Sources

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