A North-South Divide in the Garden State

New Jersey's hard water follows a clear geographic pattern, and knowing which half of the state you are in tells you most of what you need. Statewide, hardness runs from about 2.9 to 8.8 grains per gallon, moderate to hard. But that range splits along a line: northern New Jersey, fed largely by surface supplies, tends to be softer, while southern New Jersey, which leans on groundwater, runs harder.

Why the South Is Harder

Roughly 37 percent of New Jersey's public water comes from wells, and those groundwater sources are concentrated in the southern part of the state. As water percolates through southern New Jersey's aquifers, it dissolves more calcium and magnesium than the northern surface reservoirs carry. So a homeowner in South Jersey is generally heating harder water than a counterpart up north, even within the same state system.

How Hardness Reaches Your Water Heater

Wherever you fall on that 2.9-to-8.8 gpg range, your water heater is where hardness makes itself felt, because heating the water drives minerals onto the hottest surfaces. That plays out as:

• Sediment building on the bottom of a tank heater, insulating the burner and stretching out heating cycles.
• Scale coating the compact channels of a tankless heat exchanger, cutting flow and heat transfer.

The efficiency rule is worth repeating: a quarter inch of scale can cost 25 to 40 percent of your heater's efficiency. In harder-water South Jersey, that buildup accrues faster than in the softer north, so the case for protection is stronger there.

Public Wells and Iron

With so much of the state on well-sourced water, iron is a realistic possibility, especially on private wells. A salt-free conditioner does not remove iron or existing hardness, so if you see staining, test for iron and treat it separately before judging a conditioner's performance.

Honest Expectations

Our units are salt-free scale conditioners, not softeners. They do not remove the hardness minerals in your water, they do not remove iron, and they cannot dissolve scale already inside your heater. What they do is help prevent new scale from bonding to your heat exchanger and tank as water flows through, which is most valuable for the harder supplies of southern New Jersey.

Here's the right-sized salt-free scale protection for your New Jersey water heater:

Salt-free conditioners reduce and help prevent new water-heater scale; they are not softeners and do not remove existing hardness. Free U.S. shipping. See our hard water guide.