As of 2023, the population connected to urban and other secondary wastewater treatment plants in France stood at an undisclosed base level from which prospects are forecasted. The forecast for 2024 anticipates a population connection of 4.88 million units. Over the next few years, a year-on-year decrease is projected, with the value dropping to 4.32 million in 2025, 3.76 million in 2026, 3.2 million in 2027, and reaching 2.65 million by 2028.

The compound annual growth rate (CAGR) over this five-year forecast period indicates a negative trend as the population connected to such facilities diminishes gradually each year.

Future trends to watch for include:

Potential regulatory changes impacting wastewater treatment policies.
Technological advancements improving wastewater treatment efficiency.
Shifts in population distribution or urbanization rates may affect connection levels.