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Water Hardness in Stillwater, NY

New York · 1 zip codes · 11 matched water systems

292 PPM
17.1 GPG
Very Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 202611 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 11 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
11 USGS-backed sources
11 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 Stillwater

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

11 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.
Clifton Park Water Authority
NY4500175
Very Hard
276 PPMsurface water35,000 servedHigh Confidence — USGS Monitoring
Saratoga Springs City
NY4500168
Very Hard
318 PPMsurface water26,525 servedHigh Confidence — USGS Monitoring
Halfmoon Water District (Troy)
NY4519111
Very Hard
276 PPMsurface water15,000 servedHigh Confidence — USGS Monitoring
Burnt Hills-Ballston Lk Wd
NY4505658
Very Hard
308 PPMsurface water10,000 servedHigh Confidence — USGS Monitoring
Stillwater Town (Scwa)
NY4530267
Very Hard
318 PPMsurface water3,000 servedHigh Confidence — USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Stillwater, NY

What This Means For You

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

Very Hard Water - Treatment Strongly Recommended

Your water is very hard. Without treatment, you can expect significant scale buildup in pipes and appliances, higher energy bills from reduced water heater efficiency, and persistent issues with skin and hair dryness.

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 Stillwater, NY.

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Frequently Asked Questions

How hard is the water in Stillwater, NY?

The citywide weighted average water hardness in Stillwater, NY is 292 PPM (17.1 GPG), classified as very hard. This is based on 11 matched water systems.

Do I need a water softener in Stillwater, NY?

With a citywide average hardness of 292 PPM, a water softener is recommended for homes in Stillwater. Confirm your tap reading before sizing equipment.

Is hard water in Stillwater, 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 Stillwater, NY?

Stillwater, New York is served by 11 matched water systems across 1 zip code.

Learn More About Your Water