now to the toxic water scandal in flint, michigan. accusations that children are testing with dangerously high levels of lead that can lead to permanent brain damage because of decisions made by city officials in flint to save money on the water supply. nbc's stephanie gosk has the story. >> reporter: everyone who drank the water, an entire u.s. city, is at risk. >> it's just crazy. >> reporter: the most vulnerable in flint are children like april's, 1-year-old kevin has double the level of lead considered acceptable. >> i can't do nothing about it but continue to buy bottles of water with money that i do not have. >> reporter: a water quality expert tells nbc news that just $100 a day was all it would have taken to avoid this crisis. the flint river has a high salt content so it corroded the pipes that it flowed through and lead from those pipes leached into the system. experts say that treatment from the beginning could have corrected much of the problem but city officials never did it. the problem began in april 2014,