1 part per billion. on december 9, 2016, the mdeq reported that more than 96 percent of water samples in flint residencies were below the epa lead threshold of 15 ppb. on march 15, 2017, the genesee county water and waste services advisory board voted to construct a new pipeline; it would be a 7-mile (11 km), 42-inch (110 cm) connector to the kwa pipeline. the pipeline would allow the treatment of raw lake huron water, so the city of flint could continue to buy pre-treated water from the great lakes water authority. the $12 million project will allow flint to remain a customer of the glwa until at least 2019. lead exposure findings