The subjects for the survey were all men whose names appeared on the random sample for February's (1978) Narcotics Surveillance Program, with the following added conditions: (1) the inmate must have been incarcerated at that institution on February 1, 1978, and (2) the inmate's file must have been in the institution at the time of data collection (February 21 - March 10, 1978). The samples ranged from 8.3 to 17 percent, with an overall 10.6 percent sample obtained. Data show the breakdown for the survey sample by institution and security level. This information is also projected for the total population of each institution. Only level 1 facilities had a majority of their population rated as level 1. Data further present the number of beds available at each level, based on the operating capacity of each institution as well as the actual capacity of the institutions. There was a significant difference between the projected number of inmates and the operating capacity bed space at each level, particularly at level 1, where 823 more beds are needed and at level 5, where 1,118 beds would be unused. Another table shows the number of men who would require transfer to higher security level institutions (17.4 percent) and lower security level institutions (52.8 percent). Other data describe the population at each security level. Information on the evaluation of the security-level instrument is also provided.