Groundwater Regulations (Northern Ireland) 1998 (S.R. 401 of 1998).
The Regulations require the Department of the Environment to use its new powers under the Regulations and its existing powers under the Water Act (Northern Ireland) 1972 to prevent the direct or indirect discharge of list I substances to groundwater and to control pollution resulting from the direct or indirect discharge of list II substances (regs. 4 to 14).