The groundwater section of the Monthly Water Report is updated quarterly. Information gathered through monitoring enables us to make informed water resource management decisions. In Victoria, data is collected from about 1,400 groundwater sites from the State Observation Bore Network (SOBN). Groundwater level trends for GMUs have been determined based on five or (where available) 10 years' consistent monitoring data from key bores in the State Observation Bore Network (SOBN). Go to the DELWP website for more information on SOBN and GMUs.

Groundwater is reported quarterly; this update is for the 1 October to 31 December 2019 quarter.

Water supply protection areas

Of the 11 water supply protection areas (WSPAs), the short term (<5 years) groundwater level trends were categorised as:

  • rising for 1
  • declining for 7 areas
  • stable for 3 areas

Over the long term (>10 years), groundwater level trends in WSPAs were categorised as

  • rising for 2
  • declining for 3 and
  • stable for 6.

Groundwater management areas

Of the 44 groundwater management areas (GMAs) in Victoria, groundwater levels in the short term (<5 years) were categorised as:

  • rising in 3 areas,
  • declining in 23 areas and
  • stable in 14 areas.
  • There was insufficient information (through lack of state observation bores) to determine a trend in the remaining four areas.

Over the long term (>10 years), groundwater level trends in the GMAs were categorised as:

  • stable for 16 areas
  • declining in 17 areas and
  • rising in 5.
  • There is insufficient information to determine a trend in the remaining six areas.

Short term trends in Water Supply Protection Areas (WSPAs) as at end December 2019

Long term trends in Water Supply Protection Areas as at end December 2019

Short term trends in Groundwater Management Areas (GMAs) as at end December 2019

Long term trends in Groundwater Management Areas (GMAs) as at end December 2019