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FILE - In this Friday, Feb. 5, 2016 file photo, hundreds of cases of bottled water are stored at a church in Flint, Michigan. Share * [44]Share on Facebook * [45]Share on Twitter * [46]Share on Google+ * [47]Email to a Friend (Submit) Print Lead levels in the water are dropping in Flint, Michigan, marking "the beginning of the end of the public health disaster," according to the Virginia Tech University researchers who exposed the lead problem in that troubled northern U.S. city a year ago. But residents still should continue to drink only filtered tap water or bottled water while the system heals itself, lead researcher Marc Edwards told a news conference Thursday. In the most recent round of testing in July, 45 percent of homes did not have detectable levels of lead, compared to only 9 percent of homes in August 2015. "Flint water now looks like it's entering a range that is considered normal for U.S. cities," Edwards said. "Things are dramatically better now.'' U.S. federal health officials found that young children in Flint had significantly higher levels of dangerous lead in their blood after the city switched its water supply from the Detroit water system to the Flint River as a cost-cutting measure. The city switched its water supply in 2014 without ensuring that water from the Flint River had been treated with anti-corrosive agents, as required by law. It corroded the city's old water mains, turning drinking water brown due to iron contamination, and also leached lead from smaller pipes that carried water into homes. In all, nearly 100,000 people were affected by the contaminated water. Lead in water supplies can cause profound and permanent health problems, particularly in children whose brains and nervous systems are still developing. Related * Flint Water Caused 'Significantly Higher' Levels of Lead in Young Children [48] Flint Water Caused 'Significantly Higher' Levels of Lead in Young Children * Costs of Flint Water Crisis Repairs Continue to Soar [49] Costs of Flint Water Crisis Repairs Continue to Soar * Michigan Lawmakers Wrap Up Flint Water Hearings [50] Michigan Lawmakers Wrap Up Flint Water Hearings More US Stories * FILE - In this Friday, Feb. 5, 2016 file photo, hundreds of cases of bottled water are stored at a church in Flint, Michigan. [51] Flint Sees 'Beginning of the End' for Water Crisis, Researchers Say * FILE - A natural resources officer looks through a microscope at Aedes aegypti mosquitoes in Pembroke Pines, Florida, June 28, 2016. [52] House Democratic Leader Calls on Congress to Address Zika * [53] Trump, Clinton Vie for Votes in Battleground Pennsylvania * [54] Arianna Huffington signs off at The Huffington Post * [55] Key US Military Command Accused of Manipulating Islamic State Reports Most Popular * Articles + 1 [56] Washington Grills Manila's Envoy About Alleged Insulting of US Ambassador + 2 [57] South African Military Historian Boasts Huge War Collection + 3 [58] Fears Mount of Full-scale Ukraine-Russia Clash + 4 [59] Russia, Turkey Plan to Coordinate on Syria + 5 [60] Ethiopia Protests Highlight Growing Solidarity Between Oromia, Amhara Regions * Multimedia + 1 [61] August 9, 2016 + 2 [62] August 8, 2016 + 3 [63] Brazilians Struggle Economically in Midst of Olympic Games + 4 [64] American Volunteer Uses Education to Fight IS in Iraq + 5 [65] Analysts: Putin, Erdogan Meeting Largely a Show * Discussions + 1 [66] Washington Grills Manila's Envoy About Alleged Insulting of US Ambassador (10) + 2 [67] Clinton Appeals to Republicans for Support After Trump's Gun Comment (10) + 3 [68] Trump Says His Republican Critics Made 'Mess' of US (9) + 4 [69] Fears Mount of Full-scale Ukraine-Russia Clash (9) + 5 [70] Iran Executes Nuclear Scientist for Spying for the US (7) You might like also * Ilhan Omar gives a victory speech after winning a key primary in Minneapolis with a goal of becoming the first Somali-American state legislator, Aug. 9, 2016. 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