How hard is the water in Hollister, CA?

The average water hardness in Hollister, CA is 374 PPM (21.9 GPG), which is classified as very hard. This is based on data from 19 water systems serving the area.

Do I need a water softener in Hollister, CA?

With an average hardness of 374 PPM, a water softener is recommended for homes in Hollister. A water softener is strongly recommended. Very hard water can significantly reduce appliance lifespan.

How many water systems serve Hollister, CA?

Hollister, California is served by 19 water systems across 1 zip code.

Water Hardness in Hollister, CA

California · 1 zip codes · 19 water systems

148 PPM

8.7 GPG

Moderately Hard

0Soft60120180300+

Verified — State Lab Tested

City avg (weighted): 374 PPM

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

Primary Water System

Hollister, City Of

CA3510001

148 PPM

8.7 GPG · Moderately Hard

Verified — State Lab Tested

USGS environmental estimate: 587 PPM

Serves: 26,017

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.