Free Calculator
Hard Water Damage Risk Calculator
Las Vegas tap water runs about 278 ppm — some of the hardest in the country — and it slowly etches, films, and dulls natural stone. Answer a few questions to score your risk and get tailored steps to protect your marble, travertine, limestone, or granite.
Where is the stone? (check all that apply)
Your hard water risk
60/100 — Moderate
Your stone faces a moderate hard water risk. A few habit changes will keep it looking new.
Your top prevention steps
- Add a whole-home water softener to cut the ~278 ppm mineral load before it reaches your stone.
- Squeegee showers and tub surrounds after every use so minerals never get a chance to dry on.
- Use only pH-neutral, stone-safe cleaners — acidic and generic bathroom sprays will etch this stone.
Want a protection plan for your stone?
Send us your risk score and we'll recommend the exact sealing and cleaning routine — confirmed with a free in-home assessment.
This score is a planning guide based on typical Las Vegas hard water (~278 ppm) and general stone behavior; your actual risk depends on the specific stone, its finish, sealer age, and daily use. A free in-home assessment from Night & Day gives you the exact picture and a protection plan.
How the risk score works
The score weighs four things: your stone type, whether you soften your water, how many wet high-evaporation areas the stone sits in, and any damage you can already see. Acid-sensitive stones like marble, limestone, and travertine start with a higher base risk than granite, slate, or quartzite. Every wet area — showers, kitchens, floors, pool decks — adds exposure, and skipping a softener lets the full ~278 ppm mineral load hit the surface.
The best defenses are prevention, not repair: keep porous stone on a sealing schedule, wipe and squeegee wet surfaces, and use only pH-neutral cleaners. For deeper guidance, see how to remove hard water stains from natural stone and how often to seal your stone floors.
Frequently asked questions
How does Las Vegas hard water damage natural stone?
Las Vegas tap water averages around 278 ppm (roughly 16 grains per gallon), making it some of the hardest in the country. As that water evaporates it leaves behind mineral deposits — the white film and spots you see on showers and countertops. On acid-sensitive stones like marble, limestone, and travertine, the minerals and cleaning chemicals used to remove them also etch the surface, leaving dull cloudy rings. Granite, slate, and quartzite are far more resistant but can still build up cloudy scale over time.
Which stones are most at risk from hard water?
Calcium-based stones are the most vulnerable: marble, limestone, and travertine react to both mineral scale and the acidic cleaners people use to fight it, so they etch and dull quickly in showers and around sinks. Granite, slate, and quartzite are much harder and more acid-resistant, so their main hard water issue is surface scale and film rather than etching. Any stone in a wet, high-evaporation area — showers, tub decks, kitchens, and outdoor pool surrounds — faces higher risk than a dry living-room floor.
Can a water softener protect my natural stone?
Yes — a whole-home water softener is one of the most effective defenses because it removes most of the calcium and magnesium before the water ever reaches your stone, which sharply reduces film, spotting, and scale buildup. It does not make stone acid-proof, so you still need pH-neutral cleaners and regular sealing on porous stone, and you should squeegee showers after use. But paired with those habits, softened water dramatically slows hard water wear on marble, travertine, and other vulnerable surfaces.