Lake George water levels for the period 2006–2013, provided courtesy of, and with approval from (pers. com. T. Purves, Icon water, to M. Short, 2020) Icon Water (formerly ACTEW). The values are daily averages of measurements collected at an hourly frequency. The data are freely-available from the National Collaborative Research Infrastructure Strategy (NCRIS) Super Science Groundwater Portal (NCRIS, 2019). The Icon Water measurements were collected from a sensor located on the lakebed near Rocky Point (35.092°S, 149.465°E). The surface water sensor could only detect water above a depth of 0.45 m.The full dataset on the NCRIS website also includes water levels for the period 2013-2015 but they are not included here because measurements collected from August 2013 by researchers at the Australian National University were able to detect lower levels, as well as record temperature and electrical conductivity.