Higher than recommended levels of E.coli bacteria have been found in the water supply of a Canterbury town and residents are being advised to boil drinking water.
The Selwyn District Council says the advisory affects 200 homes on the Sheffield water supply for at least the next three days.
The council's manager of water services, Murray England, says they are monitoring the supply, testing water samples every day. Once it passes the test for three days in a row, he says, the "boil water" notice will be lifted.
Mr England says people should visit their doctor if they develop any symptoms of sickness, including vomiting and diarrhoea.