| Region 2 | ||||||||
| Adult IDU Clients by County | ||||||||
| Source: IDHW Client Information System | ||||||||
| 1999-2000 | 2000-2001 | 2001-2002 | 2002-2003 | 2005 | 2006 | 2007 | 2008 | |
| Clearwater | 9 | 6 | 8 | 11 | ||||
| Idaho | 4 | 7 | 4 | 7 | ||||
| Latah | 9 | 17 | 12 | 8 | ||||
| Lewis | 0 | 0 | 0 | 1 | ||||
| Nez Perce | 28 | 19 | 26 | 38 | ||||
| Total | 50 | 49 | 50 | 65 | 114 | 80 | 99 | 138 |