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The groundwater resources of the Lower Hutt Valley are an extremely valuable water resource to the Wellington region. Currently between 25 and 35 percent of the municipal supply requirements of the greater Wellington area are derived from this resource.

Forecast increases in demand and the imposition of higher minimum flow requirements in the major surface water catchments in the Wellington area will place increased pressure on this resource to cover any shorfalls in supply.

This report proposes three groundwater quality protection zones for the Lower Hutt Groundwater Zone to form a basis for the development of a comprehensive groundwater quality protection strategy.