Halifax Water is again asking people to stay away from Halifax harbour and flush less. In a news release Sunday night, the utility said a wastewater pump failure is causing "screened but untreated" wastewater to be released into the harbour. "Residents and visitors are strongly advised not to go swimming or participate in recreational activities requiring water contact in Halifax Harbour until further notice," the release said. The utility is asking people living in Larry Uteck, Park West, Clayton Park, Fairview and parts of the west and north ends of Halifax to reduce the amount of water they flush and pour down their drains.