| Region 4 | |||||||
| Adolescent Primary Drug of Abuse by County | |||||||
| Source: IDHW Client Information System | |||||||
| 2001-2002 | Alcohol | Methamphetamines | Marijuana | Cocaine | Heroin | ||
| Ada | 52 | 20 | 77 | 1 | 0 | ||
| Boise | 1 | 0 | 0 | 0 | 0 | ||
| Elmore | 4 | 1 | 3 | 0 | 0 | ||
| Valley | 9 | 0 | 11 | 0 | 0 | ||
| 2002-2003 | Alcohol | Methamphetamines | Marijuana | Cocaine | Heroin | ||
| Ada | 28 | 12 | 43 | 1 | 0 | ||
| Boise | 1 | 0 | 0 | 0 | 0 | ||
| Elmore | 3 | 2 | 3 | 0 | 0 | ||
| Valley | 7 | 0 | 7 | 0 | 0 | ||