If you’re living in Southern California, you’ve probably heard about San Diego hard water—and chances are, you’ve seen its effects firsthand. From spotty dishes to stubborn limescale on faucets, hard water is a daily reality for many San Diego residents.

What Is Hard Water?

Hard water contains high levels of minerals, mainly calcium and magnesium. These minerals aren’t dangerous to your health, but they can wreak havoc on your plumbing, appliances, and even your skin and hair.

How Hard Is San Diego’s Water?

San Diego’s water is very hard, typically measuring between 250–300 parts per million (ppm), or about 15–18 grains per gallon (gpg). This puts it in the “very hard” category on the water hardness scale.

Common Signs of Hard Water in San Diego

White, chalky buildup on faucets and showerheads

Cloudy spots on dishes and glassware

Dry skin and dull hair after showers

Soap that doesn’t lather well

Reduced appliance efficiency and lifespan

What Can You Do About It?

The most effective solution for San Diego hard water is installing a water softener. This system removes excess minerals and helps prevent scale buildup, making your water more gentle on your home—and your body.

Bottom Line

San Diego hard water is a well-known issue, but it’s one that can be managed. With the right water treatment system, you can enjoy cleaner dishes, softer skin, and longer-lasting appliances—all while living in sunny San Diego.