The concerns were raised following an unannounced inspection carried out in October 2020, the publication of which was delayed due to the Covid-19 pandemic.
Corrections received provisional findings from the report in May 2021.
The issue of CCTV cameras in showers and toilets was continually found in corrections facilities, Boshier said.
Concerns over use of force events at the prison, including around pepper spray and record-keeping, were also raised in the report.
"It is important, as a signatory to the Optional Protocol to the Convention Against Torture, Other Cruel, Inhuman or Degrading Treatment or Punishment that New Zealand is treating prisoners at a certain standard," Boshier said.
"I look forward to seeing a reduction in use of force events in future inspections," he said.