The total wastewater treatment in Spain was 87.18 units in 2023. Actual data from 2014 to 2019 shows a stable range with slight fluctuations peaking at 88.28 units in 2016 and 2018. From 2020 to 2023, there is a gradual decline at an average annual rate of approximately 0.15%. Forecasts for 2024 to 2028 indicate a continuous decline, reaching 86.23 units by 2028. The average year-on-year variation for the past two years is about -0.09%, with a five-year CAGR from 2024 to 2028 projected at -0.17% and an overall five-year growth rate of -0.86%.

Future trends to watch for:

Impact of regulatory changes and environmental policies on wastewater treatment practices.
Technological advancements in treatment methods enhancing efficiency and reducing costs.
Potential shifts in water usage patterns due to climate change and population dynamics.