How LA Hard Water Damages Appliances in the San Fernando Valley

Los Angeles tap water is among the hardest in the United States. Here's what it's doing to your appliances — and what you can do about it.

At 230–310 mg/L of dissolved calcium and magnesium minerals, LA's tap water deposits limescale throughout every water-using appliance in your home over time

In the San Fernando Valley — Van Nuys, Reseda, North Hollywood, Sherman Oaks — this is an everyday reality that shortens appliance life significantly

Here's how hard water affects each appliance: Dishwashers accumulate limescale in spray arm holes, reducing cleaning performance

You'll notice it first as cloudy glasses or dishes that come out looking pre-rinsed

Washing machines develop scale buildup in the drum, detergent dispenser, and door seal

This accelerates wear and causes the musty smell that plagues many Valley washing machines

Ice makers are among the most hard-water-sensitive appliances

The water inlet valve — a small solenoid that controls water flow — clogs with mineral deposits within 1–3 years of installation in Van Nuys homes using unfiltered tap water

A refrigerator water filter can dramatically extend ice maker life

Refrigerator water lines and dispenser systems also accumulate scale over time, reducing water flow and affecting ice production

We check for hard water damage as part of every appliance service call in the San Fernando Valley

Prevention is far cheaper than repair: use a refrigerator water filter (replace every 6 months), add rinse aid to your dishwasher, and consider a whole-home water softener if you have luxury appliances worth protecting.