Water quality, explained
Straightforward guides to the drinking-water questions people actually ask — what the rules mean, what the data can and can’t tell you, and what to do about it.
Hard Water vs. Unsafe Water: Which Problem Are You Paying to Fix?
Scale on the showerhead doesn't mean your water is dangerous — and a softener won't make unsafe water safe. Here's the evidence on hardness and health, and which fix is actually worth your money.
July 16, 2026
How TapGraded Grades Work: A Report Card for Your Water System
The Tap Grade turns a water system's EPA record into a single A–F letter. Here are the actual point values behind it, what the grade deliberately leaves out, and how to reproduce any score yourself.
July 16, 2026
Boil Water Advisory: What to Do — and What Boiling Can't Fix
The core instruction is one sentence: a full rolling boil for one minute. The details that matter are which type of advisory you're under, what boiled water covers, and why boiling never fixes a chemical problem.
July 15, 2026
Reverse Osmosis vs. Carbon Filters: Which One Is Actually Worth Buying?
The two most common home filters work by different mechanisms, remove different things, and fail differently. The certification listing — not the box copy — decides which one deserves your money.
July 15, 2026
Well Water Testing 101: You're the Utility Now
More than 43 million Americans drink from private wells no agency tests. The annual routine that covers you takes one lab order a year — here's exactly what to test, when, and where.
July 14, 2026
Lead in Water: Action Level vs. MCL (and Why Lead Has No MCL)
The health goal for lead is zero. The enforceable trigger is 15 ppb, dropping to 10 ppb in November 2027. Neither is a safe line — and knowing the difference changes how you read any lead result.
July 13, 2026
PFAS Drinking Water Rules, Explained (2026)
Six federal PFAS limits remain in force. The EPA has proposed keeping two and rescinding four — and as of mid-2026, those proposals are not final. The exact state of play, with every claim tied to a source.
July 12, 2026
How to Read Your Water Quality Report (CCR) Like You've Done It for Years
Every US community water system publishes an annual Consumer Confidence Report. Here's the working decoder — which columns do the work, which traps the table sets, and what the report will never tell you about your own tap.
July 10, 2026