Chicago has yet to post easily accessible results of screens for pharmaceuticals in drinking water on its Web site, The Chicago Tribune reported Tuesday.

Instead, information that minute quantities of such pharmaceuticals as sex hormones, painkillers or anti-cholesterol drugs have been found in Chicago's water supplies can only be accessed after determined efforts to find it on the Department of Water Management's home page, the newspaper said.

The pharmaceutical chemicals, which have also been detected in drinking water across the country, are not on U.S. government lists of regulated contaminants that city officials are required to notify residents about if found in tap water. But other cities, such as Milwaukee, which also draws its drinking water from Lake Michigan, post easy-to-understand results for pharmaceuticals online, the Tribune reported.

City officials, after first promising to test for pharmaceuticals monthly, now reportedly plan to collect water samples three times per year, using three different labs for tests.

"We haven't seen any patterns yet, so it's tough to reach any conclusions," John Spatz, the city's water commissioner, told the Tribune. "But since it's an emerging issue, we're going to keep following it."