Tiruchirappalli — AQI Trends
Year-over-year AQI trajectory for Tiruchirappalli (2023–2024). Based on CPCB station data, 2016–present.
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Tiruchirappalli — annual AQI 2023–2024
Year × month heatmap
Worst single days on record
- 2024-01-14St Joseph College (TNPCB)114
- 2024-12-17St Joseph College (TNPCB)111
- 2023-12-21St Joseph College (TNPCB)107
- 2024-12-18St Joseph College (TNPCB)99
- 2024-12-10St Joseph College (TNPCB)92
- 2023-12-24St Joseph College (TNPCB)92
- 2024-11-20St Joseph College (TNPCB)91
- 2024-11-18St Joseph College (TNPCB)87
- 2024-11-19St Joseph College (TNPCB)85
- 2024-11-12St Joseph College (TNPCB)84
What the numbers say
Overview
Tiruchirappalli's AQI moved from 73 in 2023 to 50 in 2024 — a fall of 31.5% over 1 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 Tiruchirappalli was 2023 at AQI 73, while the best was 2024 at AQI 50. The city has posted 0% of all measured days above AQI 200 (the Poor threshold), and its worst recorded single day hit 114 on 14 Jan 2024.
Why this pattern
Tiruchirappalli'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.