Meghalaya: average air quality index over the 7 days to 3 October 2026 was 128, above the 3-year median of 25 for the same week (+407%).

Daily figures mostly reflect the weather, so the observatory compares the mean of the last seven days with the same week in up to five earlier years. A breach means this week sits well outside what those years would lead you to expect, and by at least 15%. It is reported when an unusual run begins and for the latest day while it lasts, not every day.

For average air quality index, lower is better. This movement is therefore assessed as a deterioration.

This continues an unusual run that began earlier. This is a small-sample figure (e.g. a single monitoring city). Same week in earlier years: 2025 9, 2023 34, 2022 25. Daily values are compared as 7-day means because a single day mostly reflects weather.

Full history of average air quality index in Meghalaya