Whole House Water Filtration Systems in New Jersey

A whole house water filtration system is a point-of-entry system. The Minnesota Department of Health describes point-of-entry units as units that are installed on the water line as it enters the home. That is the whole design idea. One system, one location, every fixture downstream.

A typical build runs in stages:

• Sediment prefilter. Catches rust, grit, and pipe scale before they reach the carbon, which keeps the media bed from loading up early.
• Carbon tank. A bed of activated carbon that water moves through slowly enough to be treated. Chlorine and many taste and odor compounds stick to the carbon on the way past.
• Bypass valve. Lets a plumber isolate and service the system without shutting off water to the whole house.

Sizing is the part homeowners never see and always feel. Carbon needs contact time, so the tank has to match your service flow rate and your household demand. Undersize it and water moves through too fast to be treated well.

Media choice matters just as much. Standard granular activated carbon is built around free chlorine. Chloramine is a more stable disinfectant, and New Jersey American Water states in its annual water quality report that treatments to remove chloramines are different than treatments for removing chlorine. Where chloramine is the disinfectant, catalytic carbon is the media normally specified. NSF lists Chloramine Reduction as a certified claim you can look up by model, so we quote systems certified to NSF/ANSI 42 for chloramine and chlorine reduction and show you the listing.

These two get compared as if they were competitors. They are not. A whole house system is point of entry. An under sink system is point of use, which the Minnesota Department of Health describes as a unit that treats water at one faucet or one location.

They solve different problems. If the pool smell in your shower is the complaint, an under sink filter will never touch it. If you want dissolved solids out of your drinking water, a carbon tank at the main line will not do that either. Plenty of homes in our service area run both, and one visit covers the pair.

We will not put a number on your house sight unseen, and you should be wary of anyone who does. What we can give you is the range the national cost guides publish, so you start the conversation with a frame.

Bob Vila's cost guide puts a home water filtration system at roughly $1,000 to $4,000, with a national average of $2,078. It reports labor adding $300 to $500 on top of material prices, permitting running $100 to $600, and maintenance of $50 to $300 per year. Those are national figures. New Jersey labor rates and municipal permit fees run on their own schedule, so treat that range as a starting point and not a quote.

What actually moves your number:

• Flow rate and household size, which set tank and media volume
• Media type, since catalytic carbon for chloramine costs more than standard carbon
• A backwashing tank system versus a simpler cartridge housing
• Whether a softener, UV, or sediment stage shares the same install
• The layout and condition of the plumbing at your main line, including whether a drain is nearby

We are building a full New Jersey cost guide for these systems. Until it is published, the fastest route to a real number is a free quote at /free-estimate. We look at your plumbing, read your utility's report with you, and put the model and its certification in writing.

Before you pick a filter, find out which disinfectant is in your water. In our service area the answer is not the same everywhere, and that single fact changes the media we specify.

New Jersey American Water says it brings over 30 years of experience using chloramine to treat water in its Raritan System, and has used it since June 2012 in its Coastal System. The company also notes that one in five Americans receives drinking water from systems using chloramination.

The 2025 annual water quality reports show how it plays out locally:

• Raritan System (PWS ID NJ2004002): the report states that groundwater supplies are disinfected with chlorine and surface water supplies are treated with chloramines for bacteriological quality in the distribution system. Surface water is 92 percent of that system's supply and groundwater is 8 percent. Distribution system chloramines show a highest compliance result of 1.2 ppm against an MRDL of 4, with a range of 0.02 to 4 ppm.
• Short Hills System (PWS ID NJ0712001): the report lists an entry point chloramine residual of 0.3 ppm with a range of 0.3 to 3 ppm, and a distribution system chlorine residual with a highest compliance result of 1 ppm and a range of 0.7 to 1.0 ppm. Its treatment summary says groundwater is disinfected with chlorine and surface water is treated with chlorine or chloramines. A 2025 public notice from this system covered parts of Millburn, Short Hills, and Springfield.
• Southeast Morris County MUA (PWSID NJ1424001), serving Morristown, Morris Township, Hanover Township, and Morris Plains, plus customers in several nearby towns: chlorine disinfection, with a highest locational running annual average of 1.34 ppm and a range of 0.00 to 2.46 ppm against an MRDL of 4.

So one system in our area reports chloramines through the distribution system, one reports chloramine at the entry point and chlorine in the mains, and one is chlorine. That is exactly why we ask instead of assuming. Chloramine holds a residual farther through the pipes and forms fewer disinfection byproducts, which is why utilities use it, and it is also harder to strip at the house. Carbon sized for free chlorine can come up short on chloramine.

Jersey Water Pros does not offer countertop water demonstrations, and you do not need one to start. Your utility's annual water quality report names its disinfectant and its residual levels, and we read it with you at the estimate. If a number needs confirming, that goes to an NJDEP-certified lab, and we help you arrange it.

PFAS is a separate question from taste and odor, and it deserves a separate answer. New Jersey enforces its own limits, and they appear right in the reports above: a maximum contaminant level of 14 ppt for PFOA and 13 ppt for PFOS. In the 2025 Raritan System report, PFOA showed a highest result of 7 ppt with a range of ND to 7, and PFOS a highest result of 6 ppt with a range of ND to 6, both under the state limits.

Ordinary carbon is not a PFAS claim. Reduction of PFOA and PFOS is a health claim, and only a system certified for it can be described that way. NSF lists PFOA Reduction, PFOS Reduction, and Total PFAS Reduction as certified claims under NSF/ANSI 53, the standard for drinking water treatment units and health effects. Reverse osmosis systems are certified to NSF/ANSI 58 for reverse osmosis performance, and a reverse osmosis model that carries a PFAS claim carries it under NSF/ANSI 53, since NSF's listing search does not offer PFOA or PFOS reduction as a claim under Standard 58. We show you that listing for anything we quote, and we never state a reduction the certification does not cover.

For the state limits, the detection data, and a comparison of carbon, anion exchange, and reverse osmosis, see our PFAS water filter guide at /whole-house-filtration/pfas-filter-nj.