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Water Hardness in Tappan, NY

New York · 1 zip codes · 4 matched water systems

201 PPM
11.8 GPG
Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 20264 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 4 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
4 USGS-backed sources
4 matched systems total for this city; USGS monitoring is used where treated-water reports are unavailable.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

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 in Tappan

These systems are matched to Tappan, NY. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

4 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
Veolia Water New York
NY4303673
Hard
203 PPMsurface water270,000 servedHigh Confidence — USGS Monitoring
Nyack Village Water Supply
NY4303666
Hard
203 PPMsurface water14,700 servedHigh Confidence — USGS Monitoring
Suffern Village
NY4303675
Hard
215 PPMgroundwater12,000 servedHigh Confidence — USGS Monitoring
Bear Mountain Water Supply
NY4317681
Soft
7 PPMsurface water3,564 servedHigh Confidence — USGS Monitoring

Zip Codes in Tappan, NY

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

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If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Tappan, NY.

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Frequently Asked Questions

How hard is the water in Tappan, NY?

The citywide weighted average water hardness in Tappan, NY is 201 PPM (11.8 GPG), classified as hard. This is based on 4 matched water systems.

Do I need a water softener in Tappan, NY?

With a citywide average hardness of 201 PPM, a water softener is recommended for homes in Tappan. Confirm your tap reading before sizing equipment.

Is hard water in Tappan, NY 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 Tappan, NY?

Tappan, New York is served by 4 matched water systems across 1 zip code.

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