Last updated: February 2026
More than 286 million Americans get their drinking water from community water systems. While the EPA regulates over 90 contaminants, independent testing by organizations like the Environmental Working Group (EWG) consistently finds tap water contains contaminants above health guidelines — even when it's technically "legal."
We created this guide to help you understand what's actually in your water, what the real health risks are, and which filtration solutions are worth your money. No fear-mongering, no hype — just data.
Essential Water Quality Guides
Is Tap Water Safe to Drink?
The complete guide to what's in your tap water, how to check, and what to do about it.
Health AlertPFAS in Drinking Water
Forever chemicals are everywhere. Learn the health risks and which filters actually remove PFAS.
Free ToolEWG Tap Water Database
How to use the EWG database to check your specific water utility's contamination data.
RankingsBest Tap Water in the US
State-by-state rankings of tap water quality. See where your state falls.
State Water Quality Guides
City Water Guides
New York City Water Quality
Is NYC tap water really as good as everyone says? The data tells a different story.
City GuideLos Angeles Water Quality
LA's water travels hundreds of miles. Here's what it picks up along the way.
Water Filter Guides
Does Brita Remove Fluoride?
The short answer is no. Here's why, and what filters actually remove fluoride.
Product Q&ADo Brita Filters Remove Lead?
Some Brita filters remove lead, but not all. Here's which ones work and better alternatives.
ComparisonWell Water vs City Water
Each has unique risks. Learn the differences and how to test and treat both.
Not Sure Where to Start?
The single best thing you can do is test your water. A home water test kit reveals exactly what contaminants you're dealing with.
Browse Water Test Kits on Amazon →