The various drug and alcohol abuse rehab services which are accessible to drug and alcohol addicted people in Forest Knolls, California can vary in many different ways. Quite a few substance abuse treatment programs take place in a residential or inpatient setting, where clientele reside the entire time they are in rehab which offers a more therapeutic rehab environment. Others provide substance abuse rehabilitation programs on an outpatient basis which provides a sense of flexibility, though outpatient facilities are not always an appropriate alcohol and drug abuse rehabilitation service for people in Forest Knolls, CA. who are having difficulties with serious drug addiction difficulties. Whether or not inpatient or outpatient drug and alcohol abuse rehab programs are selected, there are also different amounts of time that individuals will be expected to remain in the drug and alcohol treatment center. For instance, some short-term programs offer programs for 4 weeks or less, whereas long-term facilities will demand at least a 12 week stay.