The Hardest Major Water Supply in the Country

Nevada earns a distinction most states would rather avoid: it is home to the hardest major municipal water supply in the United States. In the Las Vegas and Henderson area, hardness runs from about 16 to 22 grains per gallon, or 278 to 375 milligrams per liter. That is not merely hard, it is extreme, and it is the water millions of residents heat in their homes every day.

Why Nevada Water Is So Mineral-Heavy

Two forces combine here. The primary supply is Colorado River water, which is already high in dissolved minerals by the time it reaches southern Nevada, and the region's limestone geology adds still more calcium to the mix. In an arid climate where evaporation concentrates whatever minerals are present, the result is water that sits at the very top of the national hardness scale.

What 16-22 gpg Does to a Water Heater

At this level of hardness, scale is aggressive and fast. Your water heater takes the brunt because heating the water drives minerals out of solution onto its hottest surfaces:

• In a tank heater, a thick mineral bed accumulates over the burner, insulating it and forcing exhausting recovery cycles.
• In a tankless heater, scale plates the narrow heat-exchanger channels quickly, restricting flow and prompting error codes if left unchecked.

The efficiency cost is steep and it arrives fast in Nevada. A quarter inch of scale can erase 25 to 40 percent of a heater's efficiency, and at 16 to 22 gpg that quarter inch builds far quicker than in most of the country. For Nevada homeowners, staying ahead of scale is less optional than almost anywhere else.

Setting Honest Expectations

It is important to be clear about what a salt-free conditioner is and is not. These units are conditioners, not softeners. They do not remove the calcium and magnesium that make Nevada water so hard, and they cannot dissolve scale that has already formed inside your heater. What they do is help prevent new scale from bonding to your heat exchanger and tank surfaces as this very hard water flows through, which is most effective starting from a clean or freshly serviced heater.

If your water shows any signs of iron staining, test for iron separately, as a conditioner does nothing for iron.

Here's the right-sized salt-free scale protection for your Nevada water heater:

Salt-free conditioners reduce and help prevent new water-heater scale; they are not softeners and do not remove existing hardness. Free U.S. shipping. See our hard water guide.