Research, explainers, and practical guides that connect public water evidence to the questions households actually ask.
28 published articles6 disciplines180 cited source recordsLatest 2026-11-04
A well bacteria test costs about $14 to $40 at public labs, a basic package $60 to $70, and a broad package up to $450. Real 2026 prices from state and university labs, and what to test for.
A consumer confidence report is the yearly water quality report your utility must send by July 1. Here is what it contains, how to read its table, and what it can't show.
Coliform is a warning sign, not usually the germ itself. What a positive well test means, what to do first, and when to test again.
Small lab studies link hard water to mineral buildup on hair and, in some, weaker strands. None has measured hair loss in people. What each one found.
Five ways to check your hardness, from the signs at your sink to your utility's report and a home test, plus how to read the number you get.
The Purity Score is one number from 0 to 100 — but only for the contaminants a system actually measured. Here's how it's built, and what it deliberately leaves out.
A 'non-detect' is one of the most misread words on a water report. It does not mean zero. Here is what it actually means.
In 2024 the EPA set the first enforceable national limits on PFAS 'forever chemicals.' Here is what they are, what EPA proposed in May 2026, and what to do if PFAS is detected in your water.
Journal analysis adds context; it does not replace a water-system report, source document, ranking methodology, or certified household test.