There are quite a few various types of alcohol and drug abuse rehab services in Ontario, California which drug and alcohol addicted clients can avail themselves of. As an example, there are alcohol and drug abuse rehabilitation centers which cater to an individual with a short history of drug and alcohol abuse and would potentially find luck at a short term alcohol and drug rehab center which will require the treatment client to stay in rehab for a month or less. Then there are much more intensive and long term alcohol and drug abuse rehabilitation facilities which insist the individual commit to a stay of 3 months or more, which is decided on the individual's particular case of drug abuse and other variables including co-occurring psychological problems. Substance abuse rehab programs in Ontario can be completed on an outpatient basis or an inpatient basis, with inpatient substance abuse treatment services providing considerably better success rates as a result of a greater quality of treatment center.