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City water profile

Corning water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Corning, New York.

Median indexed hardness

138PPM

One indexed ZIP

Range 137.5–137.5 PPM

State comparison
18 PPM above
State hardness rank
#16 of 55
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Corning has 1 published ZIP profile across Steuben County. The indexed median is 138 PPM, compared with 120 PPM across New York.

Among the 55 New Yorkcities with an indexed median, Corning ranks #16from highest to lowest. Across all 132 state ZIP profiles, available estimates run from 7.2to 290 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard1 ZIP
Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
11.5 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: May 2, 2016 to May 28, 2026.

ZIP directory

Water reports in Corning

Open a ZIP for site-level provenance and measurements.

ZIP code

14830

Hard

137.5 PPM

Nearest site
11.5 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Corning City

PWSID NY5001209

Groundwater
System population served
10,300
Last reported
Jun 25, 2026

A municipal system, in-state city, and served county all agree with this Census ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
LEAD AND COPPER RULE REVISIONSNY5001209Oct 17, 2024Resolved
ToxapheneNY5001209Jul 1, 2021Resolved
Di(2-ethylhexyl) adipateNY5001209Jul 1, 2021Resolved
OXAMYLNY5001209Jul 1, 2021Resolved
SimazineNY5001209Jul 1, 2021Resolved
Di(2-ethylhexyl) phthalateNY5001209Jul 1, 2021Resolved
DinosebNY5001209Jul 1, 2021Resolved
HexachlorocyclopentadieneNY5001209Jul 1, 2021Resolved
CarbofuranNY5001209Jul 1, 2021Resolved
AldicarbNY5001209Jul 1, 2021Resolved

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Corning

Is the water hard?

The indexed city median is 138 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.