The cryptosporidium parasite resulted in about 100 deaths and made 400,000 other people ill when it was found in Milwaukee's drinking water in 1993. Boil water advisory is lifted. Physician contacts Battlefords medical health officer about a case of cryptosporidiosis, caused by the parasite cryptosporidium. Investigation into number of cases begins with examination of hospital emergency room records. Medical health officer receives notification of two additional cases.
Health officer meets with city officials about the outbreak and notifies provincial authorities.
An additional seven cases are confirmed. Boil water advisory issued based on suspicion that cases could be linked to water supply. Two more cases confirmed. Boil water advisory upgraded to an order after health officer learns there was a problem at the water treatment plant following the March 21 maintenance that could have allowed the parasite into the city water supply. First death in which parasite is found in stool.