Water Hardness in New Jersey

21 counties — Average 163.1 PPM (Hard)

10
6
4
1
Soft (47.6%) Moderate (28.6%) Hard (19.0%) Very Hard (4.8%)

New Jersey Water Hardness Map

Soft   Moderate   Hard   Very Hard

Hardest Water Counties

Hudson2000 PPM
New Jersey

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All 21 Counties — By Water Hardness

CountyClassificationHardness
Atlantic Soft 11 PPM
Bergen Hard 129 PPM
Burlington Soft 8.7 PPM
Camden Soft 43 PPM
Cape May Soft 37.3 PPM
Cumberland Soft 47 PPM
Essex Hard 126 PPM
Gloucester Soft 48 PPM
Hudson Very Hard 2000 PPM
Hunterdon Moderate 73 PPM
Mercer Soft 58.7 PPM
Middlesex Soft 43 PPM
Monmouth Soft 46 PPM
Morris Moderate 82 PPM
Ocean Soft 11.6 PPM
Passaic Moderate 77.9 PPM
Salem Moderate 67.9 PPM
Somerset Moderate 77.9 PPM
Sussex Moderate 120 PPM
Union Hard 180 PPM
Warren Hard 137 PPM

Source: USGS Water Quality Portal

Frequently Asked Questions

How hard is the water in New Jersey?

New Jersey has an average water hardness of 163.1 PPM, classified as hard. Out of 21 counties, 10 have soft water, 6 moderately hard, 4 hard, and 1 very hard.

Which New Jersey counties have the hardest water?

New Jersey has 1 counties with very hard water (above 180 mg/L). See the county table above for a complete breakdown by hardness level.

How do I check water hardness for my New Jersey address?

Enter your ZIP code in the search box above to see your area's estimated water hardness, classification, and water utility information.