A state audit has turned up 49 instances in which convicted sex offenders appear to be living at the same address as facilities for children, The Los Angeles Times reported Friday.
Patricia Ploehn, director of the county Department of Children and Family Services, said officials "were in a state of shock" over the audit.
Child-care operators and their employees are required to submit to criminal background checks, but auditors found the requirements do not apply to people who are living in the same house or apartment, the newspaper said.
After cross-referencing the addresses of 8,000 sex offenders on parole against the location of child-care facilities, auditors came up with 30 matches in Southern California.
In one case, investigators found a man convicted of four counts of rape living in a foster home in Compton.
"Government has absolutely failed in this regard," said California Assembly member Anthony Adams.