What Is Hard Water? (Orlando-Specific Guide)

What Is Hard Water?

Hard water is simply water that contains high levels of dissolved minerals -- primarily calcium and magnesium. The name "hard" is misleading because hard water isn't "hard" like a rock. It's just water that has picked up minerals as it traveled through underground rock layers.

Here's the simple chemistry:

• Calcium carbonate (CaCO3) -- the main mineral in limestone, chalk, and marble
• Magnesium carbonate (MgCO3) -- another common mineral that dissolves in water
• Other minerals -- iron, manganese, and trace minerals can also contribute to hardness

Orlando's Hardness: 10-15 GPG

Orlando's water comes from the Floridan Aquifer -- one of the most productive aquifers in the world. But it runs through thick layers of limestone, which dissolves into the water.

Here's the hardness across the Orlando metro area:

• City of Orlando: 10-15 GPG -- very hard
• Kissimmee: 12-16 GPG -- very hard to extremely hard
• Sanford: 8-12 GPG -- hard
• Winter Garden: 10-14 GPG -- very hard
• Oviedo: 9-13 GPG -- hard to very hard
• DeBary: 11-15 GPG -- very hard

How Hardness Is Measured

Grains Per Gallon (GPG): The most common unit in the water treatment industry.

Parts Per Million (PPM): Also called mg/L. Multiply GPG by 17.1 to get PPM.

Orlando's water:

• 10 GPG = 171 PPM
• 15 GPG = 257 PPM

Why Orlando Water Is So Hard

Florida's geology is the primary reason. The state sits on some of the thickest limestone deposits in the world.

1. Rainwater absorbs carbon dioxide as it percolates through soil, forming weak carbonic acid
2. The acidic water seeps into the ground and encounters limestone (calcium carbonate)
3. The acid dissolves the limestone, carrying calcium and magnesium ions into the aquifer
4. Groundwater collects these minerals for hundreds or thousands of years

Is Hard Water Safe to Drink?

Yes -- hard water is perfectly safe to drink. In fact, many health organizations consider the minerals in hard water (calcium and magnesium) to be beneficial for your health.

The issues with hard water aren't about safety -- they're about practicality and cost:

• It leaves scale deposits on pipes, fixtures, and appliances
• It requires more soap and detergent to clean effectively
• It makes dishes, glassware, and shower doors spot and streak
• It shortens the lifespan of water-using appliances
• It can leave skin feeling dry and itchy after bathing

Conclusion

Hard water isn't a health hazard -- it's a home maintenance and cost problem. If you're living in Orlando, your water almost certainly contains 10-15 grains of hardness per gallon.

Ignoring hard water means accepting higher energy bills, shorter appliance lifespans, and wasted cleaning products. The good news? There's a proven, cost-effective solution.

Not sure what level of hardness you're dealing with? Get a free water test for your Orlando home and we'll give you a precise reading -- plus a recommendation for the right solution.

Hardness Scale Reference

For context, here's how Orlando compares to other major metro areas:

Orlando ranks in the upper-mid range nationally. While not the hardest water in the country, 10-15 GPG is enough to cause significant problems without treatment.

Hard Water Across Florida

Florida's hardness varies significantly by region due to different aquifer systems and geological formations:

• North Florida (Jacksonville, Gainesville): 12-18 GPG -- the St. Johns River watershed runs through extensive limestone deposits.
• Central Florida (Orlando, Kissimmee, Sanford): 10-16 GPG -- Floridan Aquifer with heavy limestone dissolution.
• South Florida (Miami, Fort Lauderdale): 5-10 GPG -- more moderate. Miami gets most of its water from surface sources (lakes and canals) rather than the aquifer.
• West Coast Florida (Tampa, Sarasota): 8-12 GPG -- moderate to hard. The Floridan Aquifer here is slightly less mineral-rich than central Florida.

If you've moved to Orlando from South Florida, the difference in water hardness will be immediately noticeable in your dishes, skin, and laundry.

Orlando's Water Sources Explained

Understanding where Orlando water comes from helps explain why it's so hard:

The Floridan Aquifer: Orlando's primary water source is the Floridan Aquifer, one of the largest and purest aquifers in the world. It extends beneath all of Florida, most of Georgia, parts of Alabama and South Carolina, and even under the Atlantic Ocean. The aquifer contains water that ranges from ancient (thousands of years old) to modern (recharged within decades).

Why the Aquifer Produces Hard Water: As water slowly filters through limestone and dolomite rock layers over hundreds of years, it dissolves calcium and magnesium minerals. This natural process takes hundreds to thousands of years and creates the mineral-rich water that emerges from Orlando wells at 10-15 GPG.

Water Treatment Process: Once water is pumped from the aquifer, it goes through treatment that includes chlorination (for disinfection), pH adjustment (to reduce pipe corrosion), and fluoridation (for dental health). None of these processes remove hardness minerals -- and they don't need to, because hardness is not a health concern.

Orlando Water Compared to Other Cities