A new report from a civil grand jury is critical of the mental health care system and other conditions in Sonoma County Jail. The report, released Tuesday, names several issues, including chronic understaffing, inmates’ prolonged confinement to cells, and a lack of adequate medical care and substance abuse treatment. The civil grand jury says the jail is ill-equipped to manage and care for its inmates. The report also says nearly half of the inmates being held at Sonoma County’s Main Adult Detention Facility have been diagnosed with a mental health issue.