In 2023, the share of the French population connected to public sewerage stood at an estimated 77.71%. Forecasts from 2024 to 2028 indicate a steady decline, with a year-on-year decrease of approximately 0.84% in 2024, -0.84% again in 2025, and an average drop of about 0.86% annually over the five-year period, resulting in a projected 74.51% by 2028.

Future trends to watch include:

Increasing urbanization and policy initiatives aimed at expanding sewerage coverage.
Potential technological advancements in wastewater management.
Impact of environmental regulations on infrastructure investment.