How hard is the water in Monte Sereno, CA?

The average water hardness in Monte Sereno, CA is 200 PPM (11.7 GPG), which is classified as hard. This is based on data from 31 water systems serving the area.

Do I need a water softener in Monte Sereno, CA?

With an average hardness of 200 PPM, a water softener is recommended for homes in Monte Sereno. A water softener is recommended to protect your plumbing and appliances.

How many water systems serve Monte Sereno, CA?

Monte Sereno, California is served by 31 water systems across 2 zip codes.

Water Hardness in Monte Sereno, CA

California · 2 zip codes · 31 water systems

151 PPM

8.8 GPG

Moderately Hard

0Soft60120180300+

Verified — State Lab Tested

City avg (weighted): 200 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.