South Island women are currently unable to access any long term programmes to help them with their alcohol addictions.
Director of Odyssey House Nigel Loughton is concerned that only an eight week Salvation Army programme and a Kaupapa Maori service is available.
He said those programmes aren't long enough to make meaningful change.
"To get change you need a longer period of time for behavioural aspect of things. So there's not that type of programme for women."
Loughton said women currently have to head to the Wellington or Auckland for a long term programme.
But, he said, women are less likely to travel away from home as they more reluctant to leave family behind.
Mr Loughton said the service is particularly necessary as a lot of the women who need the help have children.
"I think that inter-generational stuff is an important aspect, we're doing as good as we could."