Best faucet-mounted water filters

Top pick: PUR PLUS FM2100B — it's the one to buy if you want the most filtration for the money. PUR rates it for 70 contaminants (including lead and chlorine) with about 100 gallons, roughly three months, per filter, and it's the model most people end up replacing with the same thing.

Who the others suit:

• PUR FM-3333B — the same PUR approach in a plainer white housing, and the most-reviewed option here if you want a proven, boring choice.
• Brita Faucet Mount System — best if you hate changing filters: 200 gallons and two filters in the box.
• Brita SAFF-100 — the compact one, for a small sink or a tight faucet.
• Waterdrop WD-FC-01 — a simple NSF-certified chlorine-reducer when you just want better-tasting tap water.
• VEVOR / Water Purifier System — budget and bundle options; check the certification claims before relying on them.

All of these screw onto a standard aerator thread; check yours is removable and round before ordering.