Outside the usual range11 September 2026Environment
Haryana: highest city air quality index over the 7 days to 11 September 2026 was 205, above the 5-year median of 122 for the same week (+68%).
What happened
- 7-day mean to 11 September 2026
- 205
- That day alone: 258
- 5-year median, same week
- 122
- Change
- +83
- Change, per cent
- +68%
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 61, 2024 116, 2023 143, 2022 209, 2021 122. 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 |
|---|---|---|---|
| 11 September 2026 | 258 | CPCB National Air Quality Index bulletin, 11 September 2026 (242 cities) | AQI bulletin p.1–11, Index Value column: highest of 21 city rows placed in Haryana — Manesar, S.No 153 (p.8), Poor |
| 10 September 2026 | 244 | CPCB National Air Quality Index bulletin, 10 September 2026 (243 cities) | AQI bulletin p.1–13, Index Value column: highest of 23 city rows placed in Haryana — Panipat, S.No 180 (p.9), Poor |
| 9 September 2026 | 233 | CPCB National Air Quality Index bulletin, 9 September 2026 (252 cities) | AQI bulletin p.1–13, Index Value column: highest of 24 city rows placed in Haryana — Panipat, S.No 185 (p.10), Poor |
| 8 September 2026 | 259 | CPCB National Air Quality Index bulletin, 8 September 2026 (254 cities) | AQI bulletin p.1–13, Index Value column: highest of 23 city rows placed in Haryana — Panipat, S.No 188 (p.10), Poor |
| 7 September 2026 | 155 | CPCB National Air Quality Index bulletin, 7 September 2026 (237 cities) | AQI bulletin p.1–12, Index Value column: highest of 24 city rows placed in Haryana — Panipat, S.No 176 (p.9), Moderate |
| 6 September 2026 |
Source and method
- Release
- CPCB National Air Quality Index bulletin, 11 September 2026 (242 cities)Archived fileOriginal URLFirst seen 3 Oct 2026
More signals for highest city air quality index in Haryana
Cite this
According to the India Health Observatory, Haryana: highest city air quality index over the 7 days to 11 September 2026 was 205, above the 5-year median of 122 for the same week (+68%). Source: Central Pollution Control Board, Ministry of Environment, Forest and Climate Change, CPCB National Air Quality Index bulletin, 11 September 2026 (242 cities). https://indiahealthobservatory.com/signals/worst-city-aqi--haryana--2026-09-11--baseline_breach
See also Haryana and 258 AQI in context.