PATIENTS and visitors have been ignoring the no smoking rules at Swansea's Singleton Hospital.
Community health councillors picked up on it during a routine inspection.
They have since had a response from Abertawe Bro Morgannwg University Health Board.
Director of planning Paul Stauber said: "Stopping smoking on the hospital site is a challenge and is difficult to control."
Mr Stauber said one of ABMU's objectives was reducing cardiovascular disease.
That objective, he said, could be partly achieved by reducing smoking levels.
"The board has approved a tobacco control strategic action plan," he added.
"This includes plans to support staff and patients to quit smoking and making hospital sites smoke-free areas."
Mr Stauber said additional signs had been placed onsite, reminding people it was meant to be a smoke-free area.
"Monitoring walkabouts are undertaken and people are approached and requested not to smoke," he added.