Water Hardness in 19435
Frederick, Pennsylvania · Montgomery County
Dataset updated March 9, 2026Matched to 10 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 10 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 19435
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 |
|---|---|---|---|
| Aqua Pa Main System PA1460073 | surface water | 120 PPM Moderately HardUSGS estimate: 184 PPM | |
| North Penn Water Authority PA1460034 | surface water | 120 PPM Moderately HardUSGS estimate: 154 PPM | |
| Pa American Norristown PA1460046 | surface water | 120 PPM Moderately HardUSGS estimate: 154 PPM | |
| North Wales Water Authority PA1460048 | surface water | 120 PPM Moderately HardUSGS estimate: 154 PPM | |
| Pottstown Borough Water Auth PA1460037 | surface water | 120 PPM Moderately HardUSGS estimate: 70 PPM |
Nearby Zip Codes
What This Means For You
Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
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 Frederick, PA (19435).
Frequently Asked Questions
Is the water hard in Frederick, PA (19435)?
The average water hardness in 19435 is 120 PPM (7 GPG), which is classified as moderately hard.
Do I need a water softener in 19435?
With hardness of 120 PPM, a water softener is worth considering for homes in 19435.
Is hard water in 19435 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 19435?
Zip code 19435 in Frederick, Pennsylvania is served by 10 water systems.
Learn More About Your Water
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