Water Hardness in 63103
Saint Louis, Missouri · St. Louis City County
Based on treated water data from the utility's Consumer Confidence Report (CCR) — the annual water quality report your provider is required to publish.
Our Estimate
Weighted average from 4 water systems.
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.
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 Saint Louis, MO (63103).
Water Systems Serving 63103
Nearby Zip Codes
Frequently Asked Questions
Is the water hard in Saint Louis, MO (63103)?
The average water hardness in 63103 is 120 PPM (7 GPG), which is classified as moderately hard.
Do I need a water softener in 63103?
With hardness of 120 PPM, a water softener is worth considering for homes in 63103.
How many water systems serve 63103?
Zip code 63103 in Saint Louis, Missouri is served by 4 water systems.
Learn More About Your Water
Do You Need a Water Softener? (Based on Your Water Hardness)
A data-driven guide to help you decide if a water softener is worth the investment based on your actual water hardness level.
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Salt-based softeners remove hardness minerals. Salt-free conditioners prevent scale but don't soften. Here's how to choose based on your water hardness level.
10 min readBest Shower Filters for Hard Water (2026 Reviews)
We tested KDF, Vitamin C, and carbon shower filters for hard water. Here are the filters that actually reduce mineral buildup on hair and skin.
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