Public Health Ontario provides testing for E. coli and total coliforms for private drinking water system owners. For all other environmental testing, including testing for chemical contaminants, please consult with your local public health unit.
Ontario Ministry of Health and Long-Term Care:
INFOline 1(866) 532-3161,TTY 1(800) 387-5559
PHOL Customer Service Centre,1(877) 604-4567 or (416) 235-6556