Guides
Water Quality Guides
Start with the problem, not the product. Each guide is built around a real household decision — filtration, contaminants, testing, or understanding what official data actually means.
Filtration
7 guidesBest Filter for Lead in Tap Water
Not all water filters remove lead. Learn when reverse osmosis, certified carbon filters, or testing make the most sense for lead at your tap.
Best Filter for PFAS in Drinking Water
Learn which home filtration options are most credible for PFAS, when reverse osmosis wins, when carbon can help, and what to verify before buying.
Reverse Osmosis vs Carbon Filter: Which Is Better for Tap Water?
Reverse osmosis and activated carbon solve different water problems. Compare contaminant removal, cost, maintenance, and home fit before you choose.
Whole-House Filter vs Under-Sink Filter: Which One Do You Need?
Whole-house and under-sink filters solve different problems. Learn when each setup makes sense for drinking water, chlorine, lead, PFAS, and home-wide issues.
What Type of Water Filter Do You Need for Your Problem?
Start with the water problem, not the product category. Match lead, PFAS, nitrates, chlorine, hard water, and more to the right kind of filtration.
Best Filter for Nitrates in Drinking Water
Only two technologies reliably remove nitrates from drinking water: reverse osmosis and ion exchange. Learn which one fits your situation — and what to avoid.
Best Filter for Arsenic in Well Water
Arsenic affects millions of private well users in the U.S. Learn which filters remove arsenic, which certifications matter, and how to pick the right system for your result.
Contaminants
1 guideTesting
2 guidesHome Water Test Kits vs Certified Labs: Which Can You Trust?
Home kits are not useless, but they are not the same as certified lab testing. Learn which option fits lead, PFAS, nitrate, well water, and real-life decisions.
How to Test Well Water: A Step-by-Step Guide
Private well owners have no regulatory safety net. Here's exactly how to test your well water, what to test for, how often, and how to read the results.
Understanding
4 guidesWhat Does Lead in Tap Water Actually Mean?
Lead in tap water usually comes from plumbing, not the source water. Learn what action levels, first-draw samples, and household exposure really mean.
How to Read a Water Quality Report Without Getting Lost
Confused by your annual water quality report? Learn what the numbers, acronyms, and contaminant tables actually mean in plain English.
Does Boiling Water Remove Lead, PFAS, or Nitrates?
Boiling helps with microbes, not most chemical contaminants. Learn why boiling does not remove lead, PFAS, or nitrates and what to do instead.
Is Tap Water Safe to Drink?
For most Americans, tap water is safe — but 'safe' has real limits. Learn what regulated utilities guarantee, what they don't, and when filtering makes sense.
Looking for Utility or Contaminant Data?
These guides cover general household decisions. For utility-specific data and official government records, use the directory.