A crack was discovered in the pool during the off season and it was announced the pool would be unlikely to open this season.
Clutha Mayor Bryan Cadogan said yesterday engineers had advised a temporary repair would not necessarily be effective.
''A quick fix runs the risk of a catastrophic failure of the pool,'' Mr Cadogan said.
Work was being carried out to assess what the best repair option was.
''We have to understand the serious implications of the cracking in the pool and realise it may not be a simple patch-up job.''
A long-term repair could cost more than $100,000.
Following a meeting on site among elected members, council staff, engineers and members of the public, plumbers were investigating whether any pipes needed replacing or repairing.
The condition of the concrete and ground below was also being investigated. The council expected to know the complexity of repair needed within the next two weeks.
The pool still might open this season if only a sealing job was required. However, if major ground work was needed, it would probably be closed for the whole season.
Milton Swim Club coach Nadine Lister said the community had been seriously impacted by the pool being closed.
''We haven't got a lot of facilities here,'' she said. ''The swimming pool is a major part of our community summer.''
Mrs Lister said there had been no mention of the pool closing permanently.
''The Milton community would put up a pretty big fight if it was to close.''
Some of the competition swimmers in the club travelled regularly to Balclutha Centennial Pool to practise, which was an extra cost for parents, she said.
A public information session is being held at the pool next week to inform the community about the extent of the damage.
The meeting will be held on November 26 at 5.30pm.
By Samuel White - samuel.white@odt.co.nz
