Kozhikode — AQI Trends
Year-over-year AQI trajectory for Kozhikode (2020–2023). Based on CPCB station data, 2016–present.
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Kozhikode — annual AQI 2020–2023
Year × month heatmap
Worst single days on record
- 2021-01-25Palayam Kozhikode (PCB)417
- 2021-01-24Palayam Kozhikode (PCB)326
- 2020-02-20Palayam Kozhikode (PCB)123
- 2020-12-03Palayam Kozhikode (PCB)116
- 2023-02-28Palayam Kozhikode (PCB)107
- 2020-02-17Palayam Kozhikode (PCB)107
- 2020-12-23Palayam Kozhikode (PCB)106
- 2020-02-18Palayam Kozhikode (PCB)104
- 2021-01-16Palayam Kozhikode (PCB)102
- 2020-02-21Palayam Kozhikode (PCB)102
What the numbers say
Overview
Kozhikode's AQI moved from 49 in 2020 to 78 in 2023 — a rise of 59.2% over 3 years. The long-run trend is worsening, with a regression slope of 8.8 AQI points per year.
The data story
The worst recorded year in Kozhikode was 2023 at AQI 78, while the best was 2020 at AQI 49. The city has posted 0.2% of all measured days above AQI 200 (the Poor threshold), and its worst recorded single day hit 417 on 25 Jan 2021.
Why this pattern
A worsening trend in Kozhikode typically reflects rapid urbanisation, vehicle fleet growth outpacing Bharat Stage VI emission benefits, expanding industrial activity, and in some cases new construction dust. The data points the finger at what policy needs to target next: year-round baseline emissions, not just the winter peak.
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.