With this edition of the newsletter we are including a catchment map. Hopefully this will be the first in a range of maps indicating different aspects of the catchment. The most noticeable part is the large yellow section: the Marbellup Brook sub-catchment Public Water Drinking Supply Area (PWDSA) with a designation of P2
. There are also P1
rated areas, and some locations that are not assigned a rating (see the legend, right).
The Department of Water (responsible for the protection of public water supplies) indicates that P1 areas are typically declared over publicly owned land such as crown reserves or high pollution risk areas and these areas are designated to have the highest level of protection and land use should ensure there is no degradation of the water source.
P2 areas can permit low density and low risk development such as rural areas. P2 is managed so that there is no increased risk of pollution to the water source. While some development is allowable, land use that may be considered to be potentially polluting will be restricted in these areas as the protection of the water supply is a high priority. This would include intensive agriculture and industrial land uses.
P3 is designated where a water source supply needs to coexist with other land uses such as residential, commercial and light industrial developments. These areas are managed through a set of guidelines.
The Department of Water has prepared the Marbellup Brook Catchment Area Drinking Water Source Protection Plan (www.water.wa.gov.au/ publicationStore/first/74843.pdf) to guide management of this water source. While water is not currently harvested from the Brook, the department manages the catchment to protect the potential water supply. Enquiries to: the Water Department on 9842 5760