Spatial distribution of mercury concentrations in the Molonglo River system. Mercury concentrations are categorized using the Jenks natural break classification in ArcGIS. Lake Burley Griffin and Captains Flat are shown in higher detail in the inserts. The GIS dataset used to create this figure was sourced from Geoscience Australia (2020)’s National Surface Hydrology Database. DOI: https://doi.org/10.1525/elementa.440.f6