"The security issues that arise from groups of people being housed together in a small area is becoming evident, and raising its ugly head more frequently.
" It is vital for the well-being of these families and the communities that the government finds a better solution to the lack of housing.The current solution is just not sustainable, and potentially irreversible harm is being done to the children crushed into this environment."
Kate Satterthwaite, general manager ministerial and executive services, said the MSD's Northland office was aware of the shortage of suitable housing in the region, similar to other areas, and worked with its emergency housing providers to ensure clients were safe and healthy.
"No one wants to see people who are homeless housed in motels, however it is important that those needing housing don't have to live in cars or sleep rough," she said.
"The ministry does not use backpackers or motels in high tourism areas like Paihia unless there are extraordinary circumstances."
Many of those in emergency housing were vulnerable and in complex situations, often facing circumstances that made it difficult for them to find private rental accommodation.
The role of the ministry was to ensure that those with no other options were supported into emergency accommodation, usually in motels.
"We are aware that concerns have been raised about the behaviour of a small number of the people accessing emergency housing," Satterthwaite added.
"However, the vast majority of clients are respectful of the accommodation provided to them, other guests and the local community.
"The ministry is in regular contact with our partner agencies, including the police, and work with them on how best to respond to any issues raised."
In the event of any "high risk" incidents, moteliers were advised to call the police in the first instance. If a client did not meet the "requirements" expected of them, they could be removed from emergency housing.
Moteliers were able to decide who they would like to accommodate, and the ministry actively worked with them to ensure that all parties were safe.
The December 17 letter had been referred to the police for a separate response.