The population connected to sewerage with tertiary treatment in Australia has shown varied growth over the years. In 2023, it stood at 54.24. The percentage change year-on-year has mostly been positive, with a few years showing minor declines. Significant spikes were observed in 2018 (5.69%) and 2014 (4.37%). The recent trend from 2022 to 2023 indicates a modest increase of 1.44%, with a CAGR over the last five years being 1.2%.

Looking at the forecasted data, growth is expected to continue steadily, reaching 57.87 by 2028. This forecasts a 5-year CAGR of 1.02% and an overall growth rate of 5.22% from 2024 to 2028.

Future trends to watch for include:

The potential impacts of population growth and urbanization on sewerage infrastructure.
Technology advancements in tertiary treatment, which could enhance capacity and efficiency.
The influence of governmental policies and environmental regulations on sewerage systems.