City water profile

Water hardness in New York

Find official utility reports, understand hardness, and check the water system serving your home in New York, New York.

Utility-reported hardness

18–100 ppm

Check your provider and source →

State comparison: 8 PPM below
Evidence comparison rank: #3 of 6
Matched utilities: 2
Active health records: 1

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

New York City Department of Environmental Protection

18–100 ppm

Utility-reported hardness as CaCO₃ · 2025

Reported average: 32 ppm (1.9 GPG).

313 distribution-system samples. This is a system-wide range and average; it is not a measurement from a particular ZIP or building.

Read the utility’s source report ↗

Page 11, drinking water quality testing results, Hardness (mg/L CaCO3). Source checked Sep 29, 2026.

Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

New York City System

NY7003493 · Surface water · 8,271,000 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

1 reported active health-based record(s) for this system

Read 2025 Drinking Water Supply and Quality Report ↗

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.01 mg/L
Action level: 0.015 mg/L

67% of the listed benchmark

Monitoring period: Jan 1, 2024 to Dec 31, 2024

Violation history (1)

Imported violation history for New York City System
Rule	Status	Period
Long Term 2 Enhanced Surface Water Treatment RuleHealth-based	Addressed	Feb 1, 2017

Cedar Valley Waterworks

NY1322057 · Groundwater · 300 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.0031 mg/L
Action level: 0.015 mg/L

21% of the listed benchmark

Monitoring period: Jan 1, 2021 to Dec 31, 2023

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

City summary

What the indexed records say

New York has 211 published ZIP profiles across New York County and Richmond County and Bronx County and Queens County and Kings County. The regional-evidence median is 135 PPM. Its comparison-eligible median is 127 PPM versus 135 PPM statewide.

Among the 6 New Yorkcities meeting the comparison standard, New York ranks #3from highest to lowest. Across all 830 state ZIP profiles, available estimates run from 5.5to 385.5 PPM.

The 79.6–176 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard11 ZIPs

Hard200 ZIPs

Very hard0 ZIPs

211 of 211 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 10.4 miles
Profiles with evidence: 211/211

Confidence labels

High: 0Moderate: 211Low: 0

Observation window: Aug 1, 2016 to Sep 25, 2023.

ZIP directory

Water reports in New York

Open a ZIP for site-level provenance and measurements.

ZIP code

What does the utility report?

New York City Department of Environmental Protection

Your utility’s measurements and compliance records

New York City System

Lead (90th percentile)

Cedar Valley Waterworks

Lead (90th percentile)

What the indexed records say

How local ZIP estimates compare

Distance, dates, and confidence

Water reports in New York

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