Ooty — AQI Trends
Year-over-year AQI trajectory for Ooty (2022–2024). Based on CPCB station data, 2016–present.
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Ooty — annual AQI 2022–2024
Year × month heatmap
Worst single days on record
- 2024-12-17Bombay Castel (TNPCB)164
- 2024-12-07Bombay Castel (TNPCB)161
- 2023-05-13Bombay Castel (TNPCB)142
- 2024-09-21Bombay Castel (TNPCB)133
- 2023-05-14Bombay Castel (TNPCB)130
- 2023-04-24Bombay Castel (TNPCB)127
- 2024-01-17Bombay Castel (TNPCB)126
- 2023-05-28Bombay Castel (TNPCB)126
- 2023-03-15Bombay Castel (TNPCB)120
- 2024-12-18Bombay Castel (TNPCB)119
What the numbers say
Overview
Ooty's AQI moved from 58 in 2022 to 58 in 2024 — a rise of 0.0% over 2 years. The long-run trend is roughly stable, with a regression slope of 0.0 AQI points per year.
The data story
The worst recorded year in Ooty was 2023 at AQI 59, while the best was 2022 at AQI 58. The city has posted 0% of all measured days above AQI 200 (the Poor threshold), and its worst recorded single day hit 164 on 17 Dec 2024.
Why this pattern
Ooty's trend has been stable — neither clearly worsening nor clearly improving. That stability often masks underlying growth in emissions being offset by cleaner vehicle technology or weather variability. The NCAP era from 2019 onward is the key policy backdrop; stability here means targets have not yet translated into measurable ground-level change.
What to do with this
For planners and residents, the trend matters as much as today's number. A worsening city needs aggressive source control and personal protection investments like indoor purifiers. An improving city rewards continued policy pressure but still requires caution during peak months. Use the live AQI page for day-to-day decisions and this chart for multi-year context. Year-over-year change of more than 10% in either direction is typically real signal, not noise.