Dr. Jenny Deakin:

The Senator asked how matters have changed over the past 20 years. We were at the highest concentrations of nutrients in our water in the 1990s and, since then, there was a gradual improvement year on year until approximately 2011, 2012 or 2013. In that period, we were at our lowest in respect of nutrient concentrations and loads to the environment. Since then, unfortunately, the trend has changed again and the concentrations and loads are on the rise.