From Western Australia Government
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CAWSA Part 2A Clearing Control Catchments (DWER-004)

Created 23/06/2025

Updated 24/10/2025

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The "Clearing Control Catchments - CAWSA" dataset relates to Country Areas Water Supply Act 1947 (CAWSA) Part IIA Control of Catchment Areas legislation for controlling the clearing of native vegetation to prevent salinisation of water resources in some existing or potential water source catchments. The dataset is used by the Department of Water and Environmental Regulation in administering clearing licence applications, policy decision making and for providing advice. The catchments depicted were proclaimed 1976-1978 and became subject to clearing controls where land owners and occupiers could not clear native vegetation on their property unless authorised under a CAWSA Licence to Clear. The "Clearing Control Catchments - CAWSA" dataset also shows Zones of salinity risk in the controlled catchments where Zone A is the highest salinity risk and Zone D the lowest. These zones were used to determine where, in the administration of clearing controls, some limited clearing may be granted in areas of lower salinity risk. Since the advent of Environmental Protection Act 1986 (EP Act) clearing regulations in 2004, native vegetation clearing proponents state-wide must obtain an EP Act Permit before undertaking any clearing. Landowners and occupiers of CAWSA compensated land and those exempt from the need for an EP Act clearing Permit are however still required to obtain a CAWSA Licence to Clear. This dataset was formerly known as CAWSA Part 2A Clearing Control Catchments (DOW-028)

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Additional Info

Field Value
Title CAWSA Part 2A Clearing Control Catchments (DWER-004)
Language English
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/b9656fe8-6250-4e56-b4ab-6820513471b6
Remote Last Updated 16/10/2025
Contact Point
Department of Water and Environmental Regulation
spatial.data@dwer.wa.gov.au
Reference Period 08/12/2015
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        115.835076189,
        -34.93852754099993
      ],
      [
        117.55865967600005,
        -34.93852754099993
      ],
      [
        117.55865967600005,
        -31.82846856799995
      ],
      [
        115.835076189,
        -31.82846856799995
      ],
      [
        115.835076189,
        -34.93852754099993
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Western Australia Government

Data Source

This dataset was originally found on Western Australia Government "CAWSA Part 2A Clearing Control Catchments (DWER-004)". Please visit the source to access the original metadata of the dataset:
https://catalogue.data.wa.gov.au/dataset/cawsa-part-2a-clearing-control-catchments