The Ontario government must do more to monitor the disposal of radioactive waste, critics say, because it's turning up more often in landfills.
    
The Canadian Nuclear Safety Commission said alerts about radioactive waste went off 119 times across the country last year, up from 13 in 2005-06.
  
The majority of those alerts came from southern Ontario landfills.
  
The report says the bulk of the alerts are from small quantities of radioactive substances that have a medical origin "which pose little or no risk."
  
Ontario environmental commissioner Gord Miller is concerned about the lack of details in the report.
  
The province's Environment Ministry said the increase in alarms is simply a reflection of increased monitoring and doesn't signify a growing problem.