Water Filtration

Three reverse osmosis systems for cleaner drinking water: a no-install countertop purifier, a classic 5-stage under-sink system and a tankless 800 GPD model.

The best home water test kits in 2026, compared on lab vs. at-home testing, contaminants covered (lead, bacteria, PFAS, nitrates), accuracy, speed and cost.

The best water softeners in 2026, compared on grain capacity, salt and water efficiency, salt-free options, controls, installation and cost.

The best countertop and faucet water filters in 2026, compared on certified contaminant reduction, capacity, speed, filter cost and how easy they are to set up.

The best whole house water filters in 2026, compared on what they remove, chloramine and well-water performance, flow rate, filter life and installation.

The best shower filters in 2026, compared on chlorine and chloramine reduction, NSF certification, water pressure, filter life and yearly cost.

Want filtered water straight from the tap? We compared under-sink reverse osmosis and carbon filters on certifications, lab results, filter costs and installation.

We compared the most popular water filter pitchers on lead and PFAS certifications, filter life and running costs. Here are the 5 best for 2026.