The latest problems with the water supply in Achill highlight the fact that the treatment plant on the island is not able to cope with the demand from locals and visitors, and must be included in the Government's Capital Programme.
That's according to Mayo Sinn Fein TD Rose Conway-Walsh.
It's now a week since Mayo County Council issued a Do Not Consume notice, warning people in Achill not to drink the tap water supplied from either the public water scheme or group water schemes on the island.
Some areas of the island were without any water earlier this week when reservoirs ran completely dry.
Deputy Rose Conway-Walsh says a treatment plant that can cater for a much larger population is needed.