By storing tap water overnight, you let much of the chlorine escape. These accessories attach to your kitchen-sink spigot. Most have a lever providing unfiltered water for washing dishes. Still, that's a bargain compared with bottled water, he says. The cheapest units remove bad taste and odors, chlorine and sediment.
More expensive models take out heavy metals, such as lead.
And the priciest screen microorganisms. For Water Pik's products, simply unscrew the aerator from a standard kitchen faucet and screw onto your threads, said Opperman. The company sells a full line of filtration devices, including ones needing professional installation. This deluxe system includes a faucet fixture and electronic signals telling you when to change the five filters. Arsenic is widespread in the West but also worrisome in north Oakland County.