How does Elmont's water compare to the national average?

The USA national average is 151 mg/L. Elmont (≈ 180+ mg/L) is 189 mg/L harder than average.

Elmont Water Hardness & Quality Report (2026)

Water Hardness

very hard

180+ mg/L

Very Hard

estimated · not lab-verified

Source

mixed

pH Level

7.5

neutral = 7.0

Lead

0.002 mg/L

✓ Below action level

TDS

136.3 mg/L

Est. Daily Cost

$0.91

energy & soap waste

Source: See methodology section below · Updated 2026

very hard180+ mg/LVery Hard · est.

0–60

mg/L

Soft

61–120

mg/L

Moderately Hard

121–180

mg/L

Hard

180+

mg/L

Very Hard

Appliance Damage Report

In Elmont, your appliances are currently losing 45% efficiency due to mineral buildup.

Appliance	In Elmont	Soft Water City	Efficiency Loss
Kettle	4.7 yrs	8.5 yrs	-45%
Washing Machine	6.6 yrs	12 yrs	-45%
Water Heater	8.3 yrs	15 yrs	-45%

Regional Water Comparison

How Elmont compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Elmont, New York	≈ 180+ mg/L	4 ppt	🔴 Very Hard	mixed
North Valley Stream, New York	17 mg/L	3.6 ppt	🟢 Soft	reservoir
Floral Park, New York	≈ 120–179 mg/L	5.9 ppt	🟠 Hard	reservoir
Cambria Heights, New York	≈ 60–120 mg/L	3.5 ppt	🟡 Moderately Hard	reservoir
Valley Stream, New York	≈ 120–179 mg/L	3.6 ppt	🟠 Hard	reservoir

National Benchmark

How Elmont compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Elmont	≈ 180+ mg/L	🔴 High
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Elmont's Water Unique?

Local geology and source profile

Source: MixedTDS: 136.3 mg/LpH: 7.5

The Water Authority of Western Nassau County (WAWNC) supplies Elmont, New York, in Nassau County, serving over 190,000 residents across western Nassau including New Hyde Park, Garden City, and Elmont. Water is sourced exclusively from groundwater wells tapping the Magothy and Upper Glacial aquifers. Raw water is pumped from 20+ wells and treated at facilities like the Franklin Square and New Hyde Park plants for disinfection, corrosion control, and filtration, then distributed through 1,000+ miles of mains. Contact: 516-327-4100, 1580 Union Turnpike, New Hyde Park, NY 11040.

Elmont's supply originates within the Long Island groundwater system. The Magothy Aquifer, a major Cretaceous–Pleistocene formation of sands and clays, overlies the Lloyd Aquifer, with recharge from precipitation percolating through glacial till. The Upper Glacial Aquifer consists of Pleistocene glacial sands and gravels overlying Cretaceous Raritan Formation clays. Prolonged contact with mineral-rich sediments and carbonate influences from the region's limestone outcrops imparts a hard character, elevating dissolved solids common to coastal plain aquifers.

Very hard water from WAWNC promotes significant limescale buildup in water heaters, dishwashers, washing machines, and coffee makers, reducing efficiency by up to 30% and shortening lifespan. Faucets, showerheads, and pipes accumulate deposits, restricting flow and increasing energy bills. Maintenance includes monthly vinegar descaling for fixtures, annual heater flushing, and cartridge filters. A water softener is strongly recommended to prevent scaling and protect plumbing. WAWNC water has a pH of 6.8–7.6; no PFAS exceedances have been reported, and all 156+ contaminants meet MCLGs per 2026 data. Treatment includes chlorination, fluoridation (0.7 mg/L), and pH adjustment.

Geology & Source: Magothy Aquifer and Upper Glacial Aquifer — Pleistocene glacial sands and gravels overlying Cretaceous Raritan Formation; limestone and dolomite dissolution contributes calcium and magnesium; hard supply typical of Long Island coastal plain

Other New York Water Reports

North Valley Stream

17 mg/L

🟢 Soft

Floral Park

≈ 120–179 mg/L

🟠 Hard

Cambria Heights

≈ 60–120 mg/L

🟡 Moderately Hard

Valley Stream

≈ 120–179 mg/L

🟠 Hard

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All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Elmont's water safe to drink?

Yes. Elmont's water meets all federal safety standards. The hardness is ≈ 180+ mg/L (Very Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Elmont?

At ≈ 180+ mg/L (Very Hard), Elmont's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 45%.

How does Elmont compare to the USA average?

The USA national average is 151 mg/L. Elmont (≈ 180+ mg/L) is 189 mg/L above the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Elmont is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

Water Hardness

Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

TDS — Total Dissolved Solids

Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.

Measured

PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances

EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.

Modelled

Lead

Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.

Calculated

Appliance Lifespan

Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.