Dr. Eric Young says an information system that integrates data from all water system suppliers would allow analysis if there's any problem.
He says various attempts to find such a system have so far been unsuccessful and it would have to be accomplished in small steps.
Young made the comments while releasing a drinking water report that covers various provincial programs from 2007 to 2009.
During that time, there were no outbreaks of sickness caused by water-borne illness related to drinking water.
However, the number of boil-water advisories increased to 604 in March 2009, from 480 in 2006, reflecting what the health officer says is an increased emphasis on assessing small systems and ensuring appropriate advisories are issued.