Gummidipoondi — AQI Trends
Year-over-year AQI trajectory for Gummidipoondi (2021–2024). Based on CPCB station data, 2016–present.
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Gummidipoondi — annual AQI 2021–2024
Year × month heatmap
Worst single days on record
- 2023-12-22Anthoni Pillai Nagar (TNPCB)326
- 2024-01-14Anthoni Pillai Nagar (TNPCB)302
- 2024-11-27Anthoni Pillai Nagar (TNPCB)283
- 2024-01-15Anthoni Pillai Nagar (TNPCB)280
- 2023-12-24Anthoni Pillai Nagar (TNPCB)275
- 2023-12-21Anthoni Pillai Nagar (TNPCB)274
- 2024-11-26Anthoni Pillai Nagar (TNPCB)270
- 2023-01-05Anthoni Pillai Nagar (TNPCB)268
- 2023-01-06Anthoni Pillai Nagar (TNPCB)257
- 2023-11-13Anthoni Pillai Nagar (TNPCB)256
What the numbers say
Overview
Gummidipoondi's AQI moved from 99 in 2021 to 107 in 2024 — a rise of 8.1% over 3 years. The long-run trend is worsening, with a regression slope of 11.2 AQI points per year.
The data story
The worst recorded year in Gummidipoondi was 2023 at AQI 128, while the best was 2022 at AQI 40. The city has posted 5.4% of all measured days above AQI 200 (the Poor threshold), and its worst recorded single day hit 326 on 22 Dec 2023.
Why this pattern
A worsening trend in Gummidipoondi 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.