Water Hardness in 95118
San Jose, California · Santa Clara County
Based on laboratory testing of treated tap water reported to state regulators. Updated periodically with the latest compliance data.
Our Estimate
Weighted average from 17 water systems.
What This Means For You
Hard Water - Treatment Recommended
Your water is hard. Scale buildup is likely affecting your plumbing and appliances, reducing their lifespan and efficiency. A water softener is recommended to protect your home.
Recommended Products
Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | How to Test Your Water
Know your water hardness?
If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for San Jose, CA (95118).
Water Systems Serving 95118
Nearby Zip Codes
Frequently Asked Questions
Is the water hard in San Jose, CA (95118)?
The average water hardness in 95118 is 188 PPM (11 GPG), which is classified as hard.
Do I need a water softener in 95118?
With hardness of 188 PPM, a water softener is recommended for homes in 95118.
How many water systems serve 95118?
Zip code 95118 in San Jose, California is served by 17 water systems.
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