Valley tap water carries 280 parts per million of hardness from the Colorado River and Lake Mead. Here is what that does to glass, fixtures, dishes and appliances in a Henderson home, and the habits that keep it under control.
In a Henderson home, it does not take long to notice the water. Within weeks of moving in, the shower door goes cloudy, the faucet grows a white ring and wine glasses come out of the dishwasher spotted. None of that means the house is dirty or the water is unsafe. It means the water is very hard.
This guide explains where Henderson's hardness comes from, what the numbers mean, and how to handle it room by room, using the guidance the local water agencies publish themselves.
The Southern Nevada Water Authority reports its water at 280 parts per million of hardness, which is 16 grains per gallon, and categorizes it as very hard. The City of Henderson is one of the authority's member agencies and publishes its own water quality report. Boulder City, which buys treated Colorado River water from the authority through Intake No. 3 at Lake Mead, reports an average of about 17 grains per gallon, or 290 parts per million.
The minerals are calcium and magnesium. According to the water authority, they are carried into Lake Mead by the mineral-dense Colorado River and pose no health risk. The Las Vegas Valley Water District, which supplies much of the rest of the valley, says about 90 percent of its water comes from Lake Mead and about 10 percent from deep wells that are used mainly from April to October.
For cleaning, the key point is the one the water authority makes plainly: mineral residue only forms when water evaporates. Every spot of white film on a Henderson fixture is a place where water was left to dry.
Glass shower doors show hardness faster than anything else in the house. A haze appears first along the bottom and around the handle, then spreads. Left for months, the film bonds to the glass and becomes much harder to remove.
The single most effective habit is a squeegee or a towel on the glass after the last shower of the day. If water never dries on the surface, minerals never deposit. For film that is already there, the water authority suggests lime- or mineral-dissolving household cleaners. Use them on glass, glazed tile and chrome, rinse well and dry the surface afterward.
Faucets collect a collar of white scale at the base and around the handles, where splashes dry in place. Showerheads and faucet aerators clog as scale builds inside them, which is why water pressure from a Henderson showerhead can fade over a year or two.
Dry the faucet and the sink deck after brushing teeth or washing up, and the collar barely forms. For an existing ring, a mineral-dissolving cleaner applied with a soft brush lifts it. Aerators can be unscrewed and soaked. Old scale can etch the finish underneath, and etching is permanent damage to the metal or stone rather than dirt, so some marks will not come out no matter what is used.
If you see small white flecks in a glass of tap water, the Southern Nevada Water Authority says they are usually mineral scale that formed on piping and broke loose, not a sign the water is unsafe.
In the kitchen, hardness shows up as spotted glassware, a white crust in the kettle and a film inside the coffee maker. Boulder City notes that hard water can cause cloudy ice and chalky deposits on faucets, and the same holds throughout the valley.
The water authority suggests dishwasher rinse aids, which help water sheet off glasses instead of drying in drops, and laundry detergents that include water-softening agents, which keep minerals from dulling fabric. Descale kettles and coffee makers on a schedule, and wipe the refrigerator water dispenser tray, where drips dry into a white crust.
If your home has a water softener, the setting matters. The Las Vegas Valley Water District tells customers to set softeners for 280 parts per million, or 16 grains per gallon, which matches the water authority's figure. A softener that is set too low, or that has run out of salt, lets hardness through, and the first sign is usually a returning haze on the shower glass.
A softener reduces new buildup but does not remove film that is already there. That is where a thorough clean helps. A One-Time Deep Clean will include treating shower glass for hard water spots and detailing faucets, and regular Recurring House Cleans keep fixtures wiped so film stays thin. The deep cleaning guide explains the full scope, and the recurring cleaning guide covers how often visits make sense.
The questions Henderson homeowners ask most often about this topic, answered plainly.
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