Word: filter
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...read about the outbreaks of waterborne illnesses in places like Milwaukee, Las Vegas, New York City and Washington. You've been concerned that traces of lead may be lurking in your pipes. So just to be on the safe side, you've installed a water filter on your kitchen tap. Trouble is, you may not be any better protected. In fact, the water you drink may be dirtier than it was before...
REVERSE OSMOSIS. These compact units force pressurized water across semipermeable membranes. Lead, arsenic and even some pathogens like Giardia are flushed out of the system--along with 50% to 90% of the water. The purified water that's left behind is passed through yet another filter and stored in a pressurized tank. Under-the-sink models may cost...
Unfortunately, none of these systems are worry-free. The instructions for the popular Brita pour-through carafes, for example, tell customers to change the filter every two months or after every 35 gal., whichever comes first. But many people don't count the gallons they use, and if they forget to check the calendar, they can wind up with filtered water that is in worse condition than the stuff that comes from the tap. PUR, based in Minneapolis, Minnesota, has capitalized on this all-too-human habit by marketing a filter that automatically shuts itself off when it has expired...
...Hopkins, who has only $500 a year to spend on supplies for her second-graders in Slatington, Pennsylvania, says information sent to her by such groups as the National Dairy Council is often more up to date than that in many textbooks. "I feel I have the knowledge to filter out and use only material focused toward my curriculum," Hopkins says...
...lines of feeling in 20th century photography, above all a kind of dry-eyed romanticism, subdued but haunting. In his matter-of-fact pictures of his naked wife or in his radiant seascapes, the world is both plain and pregnant with hidden meaning. Everything is seen through the filter of his yearning for understandings that are always just out of reach. The Callahan retrospective that continues through May 19 at the National Gallery of Art in Washington, then moves to Philadelphia, Atlanta, Detroit and Chicago, makes one thing plain: if he ever develops a legend, it will be the story...