Water Hardness in 10605
White Plains, New York · Westchester County
Dataset updated March 9, 2026Matched to 17 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 17 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 10605
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 |
|---|---|---|---|
| Yonkers City NY5903465 | surface water | 65 PPM Slightly HardUSGS estimate: 203 PPM | |
| Veolia Water New York, Inc. Rd-1 NY5903444 | surface water | 65 PPM Slightly HardUSGS estimate: 203 PPM | |
| Mount Vernon Water Department NY5903441 | surface water | 65 PPM Slightly HardUSGS estimate: 186 PPM | |
| Westchester Joint Water Works NY5903435 | surface water | 65 PPM Slightly HardUSGS estimate: 186 PPM | |
| White Plains City NY5903464 | surface water | 65 PPM Slightly HardUSGS estimate: 186 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 White Plains, NY (10605).
Frequently Asked Questions
Is the water hard in White Plains, NY (10605)?
The average water hardness in 10605 is 65 PPM (3.8 GPG), which is classified as slightly hard.
Do I need a water softener in 10605?
At 65 PPM, your water is relatively soft. A water softener is generally not necessary.
Is hard water in 10605 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 10605?
Zip code 10605 in White Plains, New York is served by 17 water systems.
Learn More About Your Water
How to Test Water Hardness at Home
Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.
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