The different alcohol and drug abuse treatment services which are available to alcohol and drug addicted persons in Angwin, California can differ in many various ways. Some alcohol and drug abuse treatment services take place in a residential or inpatient facility, where clientele reside the entire time they are in treatment which provides a more conducive rehab setting. Others offer substance abuse rehabilitation programs on an outpatient basis which allows for more flexibility, although outpatient programs may not be a suitable substance abuse rehab program for individuals in Angwin who are having difficulties with long term addiction issues. Whether inpatient or outpatient drug and alcohol abuse treatment services are selected, there are also different amounts of time that people will be expected to remain in the alcohol and drug treatment program. For example, many short-term programs provide programs for 4 weeks or less, while long-term centers will call for at least a 90 day stay.