This data set is a polygon coverage that can be used to identify the location of a Source Protection Area Generalized, a smoothed version of the technical Source Protection Planning Boundary (SPPB) that is owned by the Ministry of Environment (MOE).

A Source Protection Area (SPA) is an area of land and water governed by a Source Protection Authority which defines the watershed area within which the terms of reference, assessment reports and source protection plans must be developed. A Source Protection Authority is the agency, person or body responsible for developing a Source Protection Plan. 'Generally, the source protection authority follows the same structure as the conservation authority boards, which are made up of members appointed by municipal councils.'

Supplementary look-up table descriptions are available in the data description document, which is available for download from the additional documentation section.