Residents in the Wairarapa town of Carterton are still being asked to boil their water, after E-coli was detected in the water supply. The town has been on a boil water notice since the harmful bacteria was found in the water last week. The Carterton District Council says it believes it's narrowed down the potential source, but residents connected to the town's supply must still take precautions. Carterton mayor Greg Lang spoke to Gyles Beckford.