Outside the usual range1 October 2026Environment
Chhattisgarh: highest city air quality index over the 7 days to 1 October 2026 was 96, above the 5-year median of 65 for the same week (+48%).
What happened
- 7-day mean to 1 October 2026
- 96
- That day alone: 92
- 5-year median, same week
- 65
- Change
- +31
- Change, per cent
- +48%
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 a deterioration.
Historical context
Same week in earlier years: 2025 65, 2024 95, 2023 75, 2022 59, 2021 56. Daily values are compared as 7-day means because a single day mostly reflects weather.
Full history of highest city air quality index in Chhattisgarh
The underlying data
| Period | Value | Release | Where in the document |
|---|---|---|---|
| 1 October 2026 | 92 | CPCB National Air Quality Index bulletin, 1 October 2026 (247 cities) | AQI bulletin p.3–12, Index Value column: highest of 8 city rows placed in Chhattisgarh — Bilaspur, S.No 49 (p.3), Satisfactory |
| 30 September 2026 | 79 | CPCB National Air Quality Index bulletin, 30 September 2026 (255 cities) | AQI bulletin p.3–13, Index Value column: highest of 8 city rows placed in Chhattisgarh — Kunjemura, S.No 147 (p.8), Satisfactory |
| 29 September 2026 | 127 | CPCB National Air Quality Index bulletin, 29 September 2026 (252 cities) | AQI bulletin p.3–12, Index Value column: highest of 8 city rows placed in Chhattisgarh — Kunjemura, S.No 145 (p.8), Moderate |
| 28 September 2026 | 110 | CPCB National Air Quality Index bulletin, 28 September 2026 (238 cities) | AQI bulletin p.2–12, Index Value column: highest of 5 city rows placed in Chhattisgarh — Kunjemura, S.No 133 (p.7), Moderate |
| 27 September 2026 | 78 | CPCB National Air Quality Index bulletin, 27 September 2026 (235 cities) | AQI bulletin p.2–12, Index Value column: highest of 5 city rows placed in Chhattisgarh — Tumidih, S.No 223 (p.12), Satisfactory |
| 26 September 2026 |
Source and method
- Release
- CPCB National Air Quality Index bulletin, 1 October 2026 (247 cities)Archived fileOriginal URLFirst seen 3 Oct 2026
More signals for highest city air quality index in Chhattisgarh
- Chhattisgarh: highest city air quality index over the 7 days to 3 October 2026 was 100, above the 4-year median of 67 for the same week (+48%).
- Chhattisgarh: highest city air quality index over the 7 days to 28 September 2026 was 78, above the 5-year median of 59 for the same week (+31%).
- Chhattisgarh: highest city air quality index of 159 on 26 September 2026 is the highest since 8 June 2026.
- Chhattisgarh: highest city air quality index of 27 on 25 September 2026 is the lowest since 21 August 2022.
- Chhattisgarh: highest city air quality index over the 7 days to 1 September 2026 was 54, below the 4-year median of 64 for the same week (−15%).
- Chhattisgarh: highest city air quality index over the 7 days to 26 August 2026 was 64, above the 4-year median of 51 for the same week (+25%).
Cite this
According to the India Health Observatory, Chhattisgarh: highest city air quality index over the 7 days to 1 October 2026 was 96, above the 5-year median of 65 for the same week (+48%). Source: Central Pollution Control Board, Ministry of Environment, Forest and Climate Change, CPCB National Air Quality Index bulletin, 1 October 2026 (247 cities). https://indiahealthobservatory.com/signals/worst-city-aqi--chhattisgarh--2026-10-01--baseline_breach
See also Chhattisgarh and 92 AQI in context.