Most of what a water company sells you is for the whole house: chlorine, taste, smell, sediment, scale. Those are real problems and whole-home filtration solves them properly.
This article is about the two things it does not solve, and about being straight with you on where the limits are.
PFAS
PFAS are a large family of manufactured chemicals. The reason they are in the news is that they do not break down in the environment, which is where the “forever chemicals” name comes from. They have been found in water supplies in many parts of the country.
EPA set enforceable limits for several PFAS compounds in 2024, and utilities are working toward compliance with them. That is a genuine change and it is worth knowing about rather than panicking about.
At the household level, reverse osmosis is the treatment type most commonly used for PFAS at home. If PFAS is your concern, look for a unit certified to NSF/ANSI 53 or 58 for PFAS reduction. A whole-home carbon filter is not the answer here, and any company telling you otherwise is selling you the wrong box.
1,4-dioxane
1,4-dioxane is an industrial solvent stabiliser. The EPA classifies it as likely carcinogenic to humans, and its final risk evaluation concluded that it presents an unreasonable risk to human health, including cancer risk from drinking-water exposure.
Two things make it awkward. Conventional municipal treatment does not remove it reliably, and there is no federal enforceable drinking water limit for it. So compliance and absence are not the same thing here.
It is also difficult to filter. The molecule is small and highly soluble in water, which means the carbon pitcher on your counter and the filter on your faucet do not remove it.
Point-of-use reverse osmosis is the practical household option. It reduces 1,4-dioxane meaningfully rather than eliminating it, and where concentrations are high it is often paired with additional treatment.
Why the same answer keeps coming up
Whole-home filtration and reverse osmosis are complements, not competitors, and they do genuinely different jobs.
Whole-home treats every drop entering the house: showers, laundry, dishwasher, ice maker. It handles chlorine, sediment, iron and smell.
Reverse osmosis treats a small volume very thoroughly at one tap, usually the kitchen sink, for drinking and cooking. It handles dissolved solids and lead.
You cannot get the second job done by buying more of the first. That is why every whole-home system we sell includes a reverse osmosis system free.
What we will not tell you
We will not tell you your water is poison. We will not quote you a contaminant multiple from a database and present it as a legal violation. And we will not put a certification badge on a page implying a system removes something it has not been certified to remove.
Where a system carries certification, we say exactly which standard, product by product, on its own page and spec sheet. We make no NSF claim for our reverse osmosis units.
What to do about it
If PFAS or 1,4-dioxane is your specific concern, the honest answer is treatment at the tap you drink from, not a whole-home filter. For PFAS specifically, that means a reverse osmosis unit certified to NSF/ANSI 53 or 58 for PFAS reduction.
If you want to know what is actually in your own tap rather than in a regional average, that is what the free test is for. It takes about fifteen minutes and carries no obligation. Your utility also publishes an annual water quality report, and we are happy to go through yours with you.