How hard is the water in Mount Hamilton, CA?

The average water hardness in Mount Hamilton, CA is 188 PPM (11 GPG), which is classified as hard. This is based on data from 17 water systems serving the area.

Do I need a water softener in Mount Hamilton, CA?

With an average hardness of 188 PPM, a water softener is recommended for homes in Mount Hamilton. A water softener is recommended to protect your plumbing and appliances.

How many water systems serve Mount Hamilton, CA?

Mount Hamilton, California is served by 17 water systems across 1 zip code.

Water Hardness in Mount Hamilton, CA

California · 1 zip codes · 17 water systems

151 PPM

8.8 GPG

Moderately Hard

0Soft60120180300+

Verified — State Lab Tested

City avg (weighted): 188 PPM

Based on laboratory testing of treated tap water reported to state regulators. Updated periodically with the latest compliance data.

Primary Water System

San Jose Water

CA4310011

151 PPM

8.8 GPG · Moderately Hard

Verified — State Lab Tested

USGS environmental estimate: 192 PPM

Serves: 1,039,920

What This Means For You

Moderately Hard Water

Your water is moderately hard. You're likely seeing scale buildup on fixtures, spotty dishes, and may notice dry skin or hair. A water softener or conditioner can help.