Thousands of Quebecers could be getting misleading information about lead contamination in the water coming out of their taps because the province uses a sampling method that underestimates the true level of exposure, Global News has found through surveys and 84 tests of residential drinking water conducted in five cities across the province. The revelations are based on a collaborative investigation by a team of two dozen journalists from Concordia University’s Institute for Investigative Journalism, Global News and Le Devoir. The journalists fanned out across the province to knock on hundreds of doors, taking water samples for testing that revealed lead levels often higher than city workers had told residents.