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Southern Nevada Water Authority

Hard Water

Hard water is the result of dissolved, nontoxic minerals—primarily calcium and magnesium—naturally found in the Colorado River, Southern Nevada's primary water supply.

"Hard" water is often difficult to lather soap with and other effects include "cloudy" ice and white residue left on showerheads and faucets.

Drinking water containing these minerals does not pose a health concern. The levels found in our tap water are well within Safe Drinking Water Act guidelines and are small compared to the amounts generally found in foods. The hardness level of our water is about 285 parts per million (ppm) or 16.7 grains per gallon.

Many people prefer the aesthetic qualities of "soft" water and install water softening systems which remove most minerals.

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