Ministry of Municipal Affairs and Housing
www.obc.mah.gov.on.ca

Plumbing Officials Association of British Columbia
www.bcplumbingofficials.com

World Plumbing Council
www.worldplumbing.org

World Health Organization
www.who.int/en/

National Research Council
www.nrc-cnrc-gc.ca

Ministry of Environment
www.ene.gov.on.ca

Mechanical Contractors Association of Ontario
www.mcao.org

Ontario Building Officials Association
www.oboa.on.ca

Ontario Pipe Trades Council
www.optc.org

Canadian Institute of Plumbing and Heating
www.ciph.com

Alberta Mechanical Officials Society
www.amos1969.com