Outside the usual range9 August 2026Environment
Mizoram: highest city air quality index over the 7 days to 9 August 2026 was 15, below the 3-year median of 20 for the same week (−28%).
What happened
- 7-day mean to 9 August 2026
- 15
- That day alone: 14
- 3-year median, same week
- 20
- Change
- −6
- Change, per cent
- −28%
Why it matters
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 highest city air quality index, lower is better. This movement is therefore assessed as an improvement.
Historical context
Same week in earlier years: 2024 21, 2022 20, 2021 17. Daily values are compared as 7-day means because a single day mostly reflects weather.
The underlying data
| Period | Value | Release | Where in the document |
|---|---|---|---|
| 9 August 2026 | 14 | CPCB National Air Quality Index bulletin, 9 August 2026 (244 cities) | AQI bulletin p.1, Index Value column: highest of 1 city row placed in Mizoram — Aizawl, S.No 5 (p.1), Good |
| 8 August 2026 | 15 | CPCB National Air Quality Index bulletin, 8 August 2026 (248 cities) | AQI bulletin p.1, Index Value column: highest of 1 city row placed in Mizoram — Aizawl, S.No 5 (p.1), Good |
| 7 August 2026 | 14 | CPCB National Air Quality Index bulletin, 7 August 2026 (246 cities) | AQI bulletin p.1, Index Value column: highest of 1 city row placed in Mizoram — Aizawl, S.No 5 (p.1), Good |
| 5 August 2026 | 14 | CPCB National Air Quality Index bulletin, 5 August 2026 (241 cities) | AQI bulletin p.1, Index Value column: highest of 1 city row placed in Mizoram — Aizawl, S.No 5 (p.1), Good |
| 4 August 2026 | 14 | CPCB National Air Quality Index bulletin, 4 August 2026 (246 cities) | AQI bulletin p.1, Index Value column: highest of 1 city row placed in Mizoram — Aizawl, S.No 5 (p.1), Good |
| 3 August 2026 | 17 |
Source and method
- Release
- CPCB National Air Quality Index bulletin, 9 August 2026 (244 cities)Archived fileOriginal URLFirst seen 3 Oct 2026
More signals for highest city air quality index in Mizoram
- Mizoram: highest city air quality index over the 7 days to 3 October 2026 was 39, above the 3-year median of 24 for the same week (+59%).
- Mizoram: highest city air quality index of 58 on 3 October 2026 is the highest since 21 May 2026.
- Mizoram: highest city air quality index over the 7 days to 2 October 2026 was 31, above the 3-year median of 25 for the same week (+22%).
- Mizoram: highest city air quality index of 46 on 2 October 2026 is the highest since 4 June 2026.
- Mizoram: highest city air quality index over the 7 days to 12 September 2026 was 17, below the 3-year median of 23 for the same week (−29%).
- Mizoram: highest city air quality index over the 7 days to 23 August 2026 was 15, below the 3-year median of 19 for the same week (−18%).
Cite this
According to the India Health Observatory, Mizoram: highest city air quality index over the 7 days to 9 August 2026 was 15, below the 3-year median of 20 for the same week (−28%). Source: Central Pollution Control Board, Ministry of Environment, Forest and Climate Change, CPCB National Air Quality Index bulletin, 9 August 2026 (244 cities). https://indiahealthobservatory.com/signals/worst-city-aqi--mizoram--2026-08-09--baseline_breach
See also Mizoram and 14 AQI in context.