Water Hardness in 16635
Duncansville, Pennsylvania · Blair County
Dataset updated March 9, 2026Matched to 4 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 4 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.
Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.
Water Systems Serving 16635
These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
Altoona Water Authority PA4070023 | surface water | 122 PPM Moderately Hard | |
Blair Twp Water & Sewer Auth PA4070011 | surface water | 43 PPM Soft | |
Duncansville Muni Water Auth PA4070012 | groundwater | 339 PPM Very Hard | |
Bel Air Park Apts PA4070060 | groundwater | 339 PPM Very Hard |
Nearby Zip Codes
What This Means For You
Recommendations are based on the displayed ZIP hardness reading. Confirm your tap reading before sizing or buying treatment equipment.
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 Duncansville, PA (16635).
Frequently Asked Questions
Is the water hard in Duncansville, PA (16635)?
The average water hardness in 16635 is 127 PPM (7.4 GPG), which is classified as moderately hard.
Do I need a water softener in 16635?
With hardness of 127 PPM, a water softener is worth considering for homes in 16635.
Is hard water in 16635 safe to drink?
Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.
How many water systems serve 16635?
Zip code 16635 in Duncansville, Pennsylvania is served by 4 water systems.
Learn More About Your Water
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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.
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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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