ST. JOHN’S - The Newfoundland and Labrador government recently found hazardous levels of a cancer-causing gas in some of its public housing units, prompting some experts to call for mandatory testing across the country.

The Newfoundland and Labrador Housing Corp. tested for radon in 172 of its housing units as part of a pilot program with Health Canada and found 23 had levels exceeding federal health guidelines and needing remediation, a spokesperson said.