The various substance abuse treatment programs which are offered to alcohol and drug addicted individuals in Ottawa can vary in many different ways. Quite a few substance abuse treatment programs are offered in a residential or inpatient facility, where clientele reside the entire time they are in rehabilitation which provides a more conducive rehabilitation environment. Others provide substance abuse treatment programs on an outpatient basis which allows for more versatility, although outpatient centers may not be an appropriate alcohol and drug abuse rehab program for individuals in Ottawa who are struggling with serious drug or alcohol addiction issues. Whether inpatient or outpatient substance abuse treatment services are chosen, there are also different lengths of time that people will be required to remain in the drug treatment program. For instance, many short-term programs provide services for 4 weeks or less, while long-term facilities will demand at least a 12 week stay.