The Health Service Executive (HSE) and Galway County Council today announced that the water-boil notice has been lifted in the area of the county supplied by the Luimnagh plant.
The Luimnagh water treatment plant serves the area of the county to the east of Lough Corrib.
However, over 70,000 people in the area supplied by the Terryland plant, which includes Galway City, Barna, Moycullen and Castlegar should continue to boil water for drinking and food preparation until further notice to guard against infection from the cryptosporidium bacteria.
The HSE West has recommended that those with low immune systems should continue to boil drinking water as a precautionary measure, and said it would contact businesses in the area about the safe use of ice and drink machines.
Improvements to the facilities at the Luimnagh plant have eradicated the cryptosporidium bacteria that was in the water.
The water from the plant has been tested, and a report from Galway County Council declared it clean and safe for human consumption. "The number of new cases of cryptosporidiosis notified in the last month has declined to the levels expected to be seen at this time of year," the report added.
Galway citizens have been forced to boil their drinking and cooking water for the past four months due to water contamination.