|In the intermediate and late phases of a nuclear accident, major efforts in emergency radiation monitoring concentrate on foodstuffs and drinking water. The objective is to ensure that the supplied food and water are safe for public consumption. Most of the foodstuffs in Hong Kong are imported from mainland and more than 70% of the drinking water is supplied from Guangdong. Monitoring of imported food and drinking water are conducted primarily at the boundary control points. Food imported from within 50 km of the nuclear power stations is of primary concern. Those from farms near the power stations or affected by the plume are monitored more frequently. Random screening is also applied to foodstuffs at wholesale and retail markets in Hong Kong, and drinking water in reservoirs, inlets and outlets of water treatment works, water catchment areas and consumer taps.