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

The USA national average is 151 mg/L. Hopatcong (≈ 120–179 mg/L) is 1 mg/L softer than average.

Hopatcong Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

7.2

neutral = 7.0

Lead

0.005 mg/L

✓ Below action level

TDS

96 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · 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 Hopatcong, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Hopatcong	Soft Water City	Efficiency Loss
Kettle	6.8 yrs	8.5 yrs	-20%
Washing Machine	9.6 yrs	12 yrs	-20%
Water Heater	12 yrs	15 yrs	-20%

Regional Water Comparison

How Hopatcong compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Hopatcong, New Jersey	≈ 120–179 mg/L	158.6 ppt	🟠 Hard	groundwater
Hopatcong Hills, New Jersey	≈ 120–179 mg/L	158.6 ppt	🟠 Hard	groundwater
Sparta, New Jersey	≈ 120–179 mg/L	496.5 ppt	🟠 Hard	groundwater
Dover, New Jersey	≈ 120–179 mg/L	123.5 ppt	🟠 Hard	groundwater
Randolph, New Jersey	≈ 120–179 mg/L	0 ppt	🟠 Hard	groundwater

National Benchmark

How Hopatcong compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Hopatcong	≈ 120–179 mg/L	🟠 Moderate
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

Bring Scarsdale-quality water to your Hopatcong home

Shop water softeners on Amazon.com →

Shop Now

What Makes Hopatcong's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 96 mg/LpH: 7.2

The Lake Hopatcong water supply, managed by the Jefferson Township municipal water system, serves the Lake Hopatcong area in Morris County, New Jersey. This utility draws water from three groundwater wells: the East Shawnee Well, Peaks Well #1, and Peaks Well #2. These wells tap into the local groundwater aquifer system, which is the main source of drinking water for the residents.

The Lake Hopatcong area is situated in the New Jersey Piedmont physiographic province. The underlying geology features Precambrian metamorphic bedrock capped by Paleozoic sedimentary formations. Groundwater flowing through these ancient rocks dissolves minerals, specifically calcium and magnesium carbonates, which are characteristic of northern New Jersey's water chemistry and give the supply its hardness.

This hard water can lead to scale buildup in appliances like water heaters, kettles, and dishwashers, and you might notice reduced effectiveness from soaps and detergents. Many homeowners find that a whole-house water softening system significantly helps manage these issues. To maintain appliances, regular descaling is a good practice, as are water-softening additives for washing machines. The water's pH levels, tested in May 2024, ranged from 7.5 to 9.3, with some readings surpassing New Jersey Surface Water Quality Standards.

Geology & Source: Precambrian metamorphic and Paleozoic sedimentary rocks; dissolved calcium and magnesium carbonates result in hard water

Other New Jersey Water Reports

Hopatcong Hills

≈ 120–179 mg/L

🟠 Hard

Sparta

≈ 120–179 mg/L

🟠 Hard

Dover

≈ 120–179 mg/L

🟠 Hard

Randolph

≈ 120–179 mg/L

🟠 Hard

Report an Issue

Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

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

Frequently Asked Questions

Is Hopatcong's water safe to drink?

Yes. Hopatcong's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Hopatcong?

At ≈ 120–179 mg/L (Hard), Hopatcong'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 20%.

How does Hopatcong compare to the USA average?

The USA national average is 151 mg/L. Hopatcong (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Hopatcong 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.