The council received a ''detailed seismic assessment'' report from Beca, an engineering consultancy group, on 14 buildings and community halls in the district.
The report identified 10 of the 14 buildings assessed were classified as earthquake-prone.
A building assessed with less than 34% of the New Building Standard (% NBS) is categorised as earthquake-prone and those greater than 34% NBS but less than 67% NBS are categorised as earthquake-risk buildings.
Clutha District Council Service delivery group manager Jules Witt was not particularly surprised by the figures. He said the council was already aware the buildings assessed were at least a risk in earthquakes.
The latest report was more in-depth, on top of what the council had already been told.
Mr Witt said the work to strengthen the buildings would vary for each building.
The Balclutha Centennial Pool and the Owaka Memorial Community Centre were the only two identified as ''earthquake-risk'' buildings.
Mr Witt was unsure why the Centennial Pool was above the 67% EBS.
Buildings received an overall rating even if only one part of the building was earthquake-prone and the rest was up to standard, he said.
Another report was needed to identify what needed to be done.
''For example the town hall, a lot of it is OK but ... the concrete structure is at risk.''
Only the Hillend Community Centre was certified ''OK'' of those assessed.
The council was required to strengthen buildings in a low-risk zone within 35 years and those within a medium-risk zone within 25 years.
Mr Witt said the council was not waiting to strengthen buildings and was acting promptly.
The Lawrence Service Centre, Lawrence Catholic Church, Tapanui Service Centre and the Clutha Valley Community Centre are all in a medium-risk zone.
The remaining buildings are in the low-risk zone.
The council ''really needed'' the next report to identify which buildings could be easily fixed and which ones could be more expensive, Mr Witt said.
''The stage we really want to get to is to identify the likely cost it will be to bring them up to the acceptable standard.''
He said people were no more at risk in the council buildings than any other building in the district and there was ''a lot more scrutiny'' on standards since the Christchurch earthquakes.
