Hundreds of thousands of Canadians have been unwittingly exposed to high levels of lead in their drinking water, with contamination in several cities consistently higher than they ever were in Flint, Michigan, according to an investigation that tested drinking water in hundreds of homes and reviewed thousands more previously undisclosed results.

Residents in some homes in Montreal, a cosmopolitan city an hour north of the U.S.-Canada border, and Regina, in the flat western prairies, are among those drinking and cooking with tap water with lead levels that exceed Canada's federal guidelines. The investigation found some schools and daycares had lead levels so high that researchers noted it could impact children's health. Exacerbating the problem, many water providers aren't testing at all.

It wasn't the Canadian government that exposed the scope of this public health concern.

A yearlong investigation by more than 120 journalists from nine universities and 10 media organizations, including The Associated Press and the Institute for Investigative Journalism at Concordia University in Montreal, collected test results that properly measure exposure to lead in 11 cities across Canada. Out of 12,000 tests since 2014, one-third — 33% — exceeded the national safety guideline of 5 parts per billion; 18% exceeded the U.S. limit of 15 ppb.

In a country that touts its clean, natural turquoise lakes, sparkling springs and rushing rivers, there are no national mandates to test drinking water for lead. And even if agencies do take a sample, residents are rarely informed of contamination.

"I'm surprised," said Bruce Lanphear, a leading Canadian water safety researcher

[link to www.msn.com]