In 2023, Japan's secondary wastewater treatment coverage stood at approximately 44.97% of the population. From 2024 to 2028, forecasted data indicates a declining trend. The share of the population connected to secondary wastewater treatment decreases year-on-year: 44.45% in 2024, 43.94% in 2025, 43.44% in 2026, 42.95% in 2027, and 42.47% in 2028. This downward trend suggests a continued reduction in population coverage.
Year-on-year variations are:
- 2024: -1.16%
- 2025: -1.15%
- 2026: -1.14%
- 2027: -1.13%
- 2028: -1.12%
The compound annual growth rate (CAGR) over the five-year period is approximately -1.14% per year.
Future trends to watch for include advancing technology in wastewater treatment, potential policy changes promoting higher wastewater treatment standards, and demographic shifts impacting urban and rural infrastructure development.
