A–Z contaminant guides
Water Problems Library — Find What’s in Your Water
Every common water problem in one place: plain-English guides covering what each contaminant is, where it comes from, the legal limit in drinking water, and the filter media that actually removes it — from lead and hard-water scale to bacteria, silica, and MTBE.
PFAS in Water
PFAS in drinking water: where it comes from, EPA limits, and which filter technologies actually work — honest comparison, test-first guidance, no marketing claims.
TDS in Water
TDS in drinking water: where it comes from, EPA limits, and which filter technologies actually work — honest comparison, test-first guidance, no marketing claims.
Iron in Water
Iron in drinking water: where it comes from, EPA limits, and which filter technologies actually work — honest comparison, test-first guidance, no marketing claims.
Sediment in Water
Sediment in drinking water: where it comes from, EPA limits, and which filter technologies actually work — honest comparison, test-first guidance, no marketing claims.
Microplastics in Water
Microplastics in drinking water: where it comes from, EPA limits, and which filter technologies actually work — honest comparison, test-first guidance, no marketing claims.
Lead in Water
Lead in drinking water: where it comes from, EPA limits, and which filter technologies actually work — honest comparison, test-first guidance, no marketing claims.
Hard Water
Hard Water in drinking water: where it comes from, EPA limits, and which filter technologies actually work — honest comparison, test-first guidance, no marketing claims.
Fluoride in Water
Fluoride in drinking water: where it comes from, EPA limits, and which filter technologies actually work — honest comparison, test-first guidance, no marketing claims.