Your utility tests the plant. Not your tap.
Water quality is measured where it's treated. Then it travels miles of pipe to your kitchen — and a lot can happen in between.
Here's something most homeowners never think about: when a water utility reports that the water is clean, they're describing the water leaving the treatment plant. The Consumer Confidence Report your utility mails every year is an honest, accurate snapshot — of the water at the source.
Between that plant and your kitchen faucet are miles of water mains, a service line that connects your house to the street, and your home's own plumbing. Utilities are clear about this. Aquarion's report states plainly that it provides high-quality water but "cannot control the variety of materials used in plumbing components in your home." New York City's DEP says the same thing about its supply.
That's the last mile — the stretch the utility doesn't test, because it can't. It's where lead from older service lines and brass fittings shows up, where chlorine keeps reacting with organic matter to form byproducts, and where the number on the report and the number at your tap can quietly diverge.
None of this means the water is unsafe. It means the only measurement that describes your water is one taken at your tap. That's the gap we exist to close.