Gangtok — AQI Trends
Year-over-year AQI trajectory for Gangtok (2022–2024). Based on CPCB station data, 2016–present.
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Gangtok — annual AQI 2022–2024
Year × month heatmap
Worst single days on record
- 2023-01-16Zero Point GICI (SSPCB)264
- 2023-01-15Zero Point GICI (SSPCB)220
- 2023-01-17Zero Point GICI (SSPCB)194
- 2024-03-19Zero Point GICI (SSPCB)191
- 2023-03-13Zero Point GICI (SSPCB)187
- 2022-12-29Zero Point GICI (SSPCB)182
- 2023-04-18Zero Point GICI (SSPCB)181
- 2023-04-17Zero Point GICI (SSPCB)164
- 2023-01-18Zero Point GICI (SSPCB)159
- 2024-04-24Zero Point GICI (SSPCB)158
What the numbers say
Overview
Gangtok's AQI moved from 34 in 2022 to 48 in 2024 — a rise of 41.2% over 2 years. The long-run trend is worsening, with a regression slope of 7.0 AQI points per year.
The data story
The worst recorded year in Gangtok was 2023 at AQI 62, while the best was 2022 at AQI 34. The city has posted 0.3% of all measured days above AQI 200 (the Poor threshold), and its worst recorded single day hit 264 on 16 Jan 2023.
Why this pattern
A worsening trend in Gangtok 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.