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Water Hardness in New Jersey Cities

Water hardness is determined by the amount of calcium and magnesium ions present in the water. This attribute can differ across New Jersey, as its cities each have unique geological characteristics and water supply sources that influence water hardness levels.

In New Jersey, water hardness can range from soft to very hard depending on the particular city or region. For instance, cities in Northern New Jersey that rely on surface water from reservoirs or rivers may generally have softer water. In contrast, areas in Central and Southern New Jersey that use groundwater from wells might exhibit harder water due to the minerals from the local bedrock that dissolve into the water supply.

The water hardness values for cities in New Jersey can tell us more about the specific conditions experienced locally. While these values may fluctuate, many communities in New Jersey are known to encounter water with varying degrees of hardness. Hard water can influence several aspects of daily life from the taste of tap water to how well household cleaning agents work, and it can also affect the lifespan and efficiency of water-using appliances.

The water hardness levels in the state of New Jersey also show variation across different cities, with measurements given in parts per million (ppm) and grains per gallon (gpg). Jersey City has a hardness level of 140.0 ppm, 8.18 gpg, while Paterson, Clifton, and Passaic each have levels of 89.0 ppm, 5.20 gpg. In comparison, Elizabeth has a somewhat higher level at 97.0 ppm, 5.67 gpg, and Trenton’s water registers at 80.6 ppm, 4.73 gpg. Among the highest, East Orange stands out with a water hardness of 485.0 ppm, 28.33 gpg. In contrast, Vineland has one of the lowest recorded levels in the state at 27.0 ppm, 1.58 gpg. Cities such as Newark, Camden, New Brunswick, Plainfield, and several others did not have available data.

CityHardness ppm (mg/L)Hardness gpgInformation SourceNotes
Newarkn/an/aLink
Jersey City140.08.2LinkMedian of range
Paterson89.05.2LinkPassaic Valley Main System, took median of Little Falls range as that’s the main source and Wanaque which is blended with it. The other listed sources are only occasionally added
Elizabeth97.05.7LinkVia Zip Lookup
Trenton80.64.7Link
Clifton89.05.2LinkPassaic Valley Main System, took median of Little Falls range as that’s the main source and Wanaque which is blended with it. The other listed sources are only occasionally added
Camdenn/an/aLink
Passaic89.05.2LinkPassaic Valley Main System, took median of Little Falls range as that’s the main source and Wanaque which is blended with it. The other listed sources are only occasionally added
Bayonne82.54.8LinkVia Zip Lookup
East Orange485.028.3Link
Union City154.09.0LinkVia Zip Lookup
Vineland27.01.6LinkMedian of range
Hoboken140.08.2LinkPurchases from Jersey City
New Brunswickn/an/aLink
Perth Amboy77.04.5Link
Plainfieldn/an/aLinkVia Zip lookup
West New York154.09.0LinkVia Zip lookup
Hackensack154.09.0LinkVia Zip lookup
Sayreville138.08.1Link
Lindenn/an/aLinkVia Zip lookup
Kearny49.02.9LinkKearny doesn’t report hardness directly, but gets water exclusively from NJDWSC, which has hardness reported in the Patterson CCR.
Fort Lee154.09.0LinkVia Zip lookup
Atlantic Cityn/an/aLinkVia Zip lookup
Fair Lawn222.513.0LinkUsed median of combined range
Garfield382.022.3Link
Long Branch108.06.3LinkVia Zip lookup
Princetonn/an/aLinkVia Zip lookup
Westfieldn/an/aLinkVia Zip lookup
Rahway208.012.2LinkVia Zip lookup
Englewood154.09.0LinkVia Zip lookup
Bergenfield154.09.0LinkVia Zip lookup
Millvillen/an/aLinkReport has alkalinity only
Bridgetonn/an/aLinkWater CCR not available on their website
Paramus154.09.0LinkVia Zip lookup
Ridgewood354.520.7LinkMedian of range
Lodi89.05.2LinkTook the blended number of PWIC and WanaqueWTP which are the main sources
Cliffside Park154.09.0LinkVia Zip lookup
Carteretn/an/aLinkVia Zip lookup
South Plainfieldn/an/aLinkVia Zip lookup
Summitn/an/aLinkVia Zip lookup
North Plainfieldn/an/aLinkVia Zip lookup
Rosellen/an/aLinkVia Zip lookup
Lindenwoldn/an/aLinkVia Zip lookup
Secaucus154.09.0LinkVia Zip lookup
Elmwood Park89.05.2LinkTook the blended number of PWIC and WanaqueWTP which are the main sources
Glassboro40.62.4LinkMedian of range
Pleasantvillen/an/aLinkVia Zip lookup
Morristown233.513.6LinkMedian of range
Palisades Park154.09.0LinkVia Zip lookup
Hawthorne168.39.8LinkTook average of all 4 listed treatment facilities
Tinton Falls108.06.3LinkVia Zip lookup
Harrison89.05.2LinkTook the blended number of PWIC and WanaqueWTP which are the main sources
Point Pleasant64.33.8Link
Rutherford154.09.0LinkVia Zip lookup
Dover100.05.8Link
Dumont154.09.0LinkVia Zip lookup
Madisonn/an/aLink
New Milford154.09.0LinkVia Zip lookup
North Arlington89.05.2LinkTook the blended number of PWIC and WanaqueWTP which are the main sources
South River136.07.9Link
Phillipsburg150.08.8Link
Tenafly154.09.0LinkVia Zip lookup
Asbury Park108.06.3LinkVia Zip lookup
Highland Park86.05.0Link
Metuchen101.05.9Link
Fairview154.09.0LinkVia Zip lookup
Hammontonn/an/aLink
Ramseyn/an/aLink
Edgewater154.09.0LinkVia Zip lookup
Middlesex101.05.9Link
Hopatcongn/an/aLink
Collingswoodn/an/aLink
Roselle Parkn/an/aLinkVia Zip lookup
New Providencen/an/aLinkVia Zip lookup
Eatontown108.06.3LinkVia Zip lookup
Woodland Park89.05.2LinkTook the blended number of PWIC and WanaqueWTP which are the main sources
Florham Parkn/an/aLink
Ridgefield Park154.09.0LinkVia Zip lookup
Red Bank86.55.1Link
Oakland315.018.4LinkAverage of range
Somervillen/an/aLinkVia Zip lookup
Freeholdn/an/aLink
Haddonfieldn/an/aLinkVia Zip lookup
Glen Rock354.520.7LinkCovered by Ridgewood
Hasbrouck Heights108.56.3LinkVia Zip lookup
River Edge154.09.0LinkVia Zip lookup
Bound Brookn/an/aLinkVia Zip lookup
Wallington129.07.5LinkAverage of range
Bellmawrn/an/aLinkVia Zip lookup
Ringwood140.08.2LinkWeighted average of sources
Guttenberg154.09.0LinkVia Zip lookup
Gloucester City96.05.6Link
Ridgefield154.09.0LinkVia Zip lookup
Westwood154.09.0LinkVia Zip lookup
Ocean Cityn/an/aLinkVia Zip lookup
Wanaque49.02.9Link
Beachwoodn/an/aLink
Franklin Lakes283.016.5LinkVia Zip lookup
Pompton Lakes233.013.6Link
Totowa89.05.2LinkTook the blended number of PWIC and WanaqueWTP which are the main sources
Top 100 New Jersey cities by population and their reported water hardness
ppm = Parts Per Million
mg/L = Milligrams Per Liter
gpg = Grains Per Gallon

Hard water can cause issues such as mineral buildup in plumbing and appliances, reduce the efficacy of soaps and detergents, and affect the taste of the water. A tried and true solution is the use of a water softener. A water softener, like the ones from DROP, could be a worthwhile investment.

These devices work by replacing the calcium and magnesium ions that cause hardness with sodium ions, resulting in softer water. With innovative features, easy installation, and efficient operation, DROP smart water softeners provide a solution to hard water issues, extending the lifespan of appliances, improving water taste, enhancing soap effectiveness, reducing scale build-up, and increasing the overall water efficiency in your home.

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