Canadian Centre on Substance Abuse
Ph: (613) 235-4048
Mailing address: Suite 300, 75 Albert St., Ottawa, ON K1P 5E7.
This organisation is dedicated to reducing addictions at a national level and has a comprehensive list of treatment services in Canada called the CCSA Addictions Databases. They also have information on things to consider when selecting the most appropriate treatment.

Drug and alcohol registry of treatment (DART)
Helpline in Ontario: 1-800-565-8603.
for the rest of Canada: 1-519-439-0174.
DART provides information and referral to alcohol and drug treatment services.