The inspection of HMP Oakwood by HMI Prisons found a number of concerns with the prison for category C inmates.
The inspection found too many prisoners felt unsafe and there was clear evidence of drug and alcohol use.
Prisoners were unable to access basic facilities, such as cleaning materials and kit, the report said, while staff-prisoner relationships were not respectful.
Healthcare provision was "very poor", inspectors said, which resulted in the Care Quality Commission hitting the healthcare provider with a regulatory enforcement notice, it added.
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