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East Region
*The long term average (LTA) has been calculated statistically, using the long term data record for this hydrograph. The respective drought zones are used as operational triggers, and have been derived using the LTA.
Rainfall in our East region was above average in November at 145% of the Long Term Average (LTA). Over the last three months (September to November inclusive), our East region has received above average rainfall (101% of the LTA) and below average effective precipitation (67% of the LTA). Soils dryness (SMD) remains above average, meaning any forthcoming rainfall is unlikely to contribute significantly to groundwater recharge until soils are wetter. Note that summer effective precipitation levels (the amount of rainfall which reaches groundwater) are usually low. Average effective precipitation levels over the winter are higher.
Groundwater levels remain below the LTA and have continued to remain within Environmental Stress. Under all rainfall scenarios (40, 60%, 80%, 100% and 120%) of the LTA, groundwater levels are likely to escape this zone by the end of the calendar year. 40-60% LTA rainfall will likely result in levels recovering out of Environmental Stress until late Spring 2026. Under 80% LTA, groundwater levels are likely to enter Environmental Stress by late summer 2026.
Please refer to our Drought Plan for what this means for us and our customers.