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Water Hardness in 12911

Au Sable Chasm, New York · Clinton County

185 PPM
10.8 GPG
Hard
0Soft60120180300+
High Confidence - USGS Monitoring

Dataset updated March 9, 2026Matched to 6 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 6 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.

Source basis
3 USGS-backed sources
6 matched systems total for this ZIP; 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 Serving 12911

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.

6 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.
Plattsburgh City
NY0900217
Hard
188 PPMsurface water24,173 servedHigh Confidence - USGS Monitoring
Greater Plattsburgh Water District
NY0900220
Hard
188 PPMgroundwater11,162 servedHigh Confidence - USGS Monitoring
Peru Wd
NY0900216
Hard
188 PPMsurface water2,700 servedEstimated - County Avg
Rouses Point Village Wd
NY0900223
Hard
188 PPMsurface water2,550 servedEstimated - County Avg
Dannemora Village
NY0900213
Slightly Hard
79 PPMgroundwater1,228 servedHigh Confidence - USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

129721851294420129031850548663129011851299616054466912962185054016912985185054046812918185

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.

MethodologyData sourcesHow 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 Au Sable Chasm, NY (12911).

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Frequently Asked Questions

Is the water hard in Au Sable Chasm, NY (12911)?

The average water hardness in 12911 is 185 PPM (10.8 GPG), which is classified as hard.

Do I need a water softener in 12911?

With hardness of 185 PPM, a water softener is recommended for homes in 12911.

Is hard water in 12911 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 12911?

Zip code 12911 in Au Sable Chasm, New York is served by 6 water systems.

Learn More About Your Water

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