By the Numbers: UNICEF's Tap Project aims to provide safe, clean drinking water worldwide

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Minimal amount patrons of restaurants nationwide are being asked to pay for tap water as part of the third annual U.S. Fund for UNICEF's Tap Project, which runs through March 28 as part of World Water Week. A single dollar can provide 40 liters of safe, clean drinking water, enough for 40 children for a day, according to the U.S. Fund for UNICEF.

UNICEF says that almost 900 million people around the globe lack access to clean drinking water and that 4,200 children die every day of water-related diseases. The organization has efforts under way in more than 90 countries to enhance access to safe water and sanitation.

Last year, more than 2,300 restaurants in 44 states took part in the Tap Project. To find a restaurant in your area, perform a search here.

Essential information: Concerns about drinking-water supplies in this country remain, as we reported last fall. Since it's important to know what's in your water, learn how to decipher the report from your community water system. Then determine whether you need a home water filter.