The EyeOnWater Australia app allows you as a user to contribute to science and supply information about the water colour of fresh- as well as saline waters (lakes, rivers, coastal streams, seas, and oceans) near your location or elsewhere. Your measurements are validated and stored on a central server, after which they are visible on the EyeOnWater website: www.eyeonwater.org. What is it you measure? You can send measurements for water colour, PH, conductivity, Secchi disk depth and others. Wa