Coimbatore vs Gangtok
Side-by-side air quality comparison between Coimbatore and Gangtok.
Live AQI from Open-Meteo CAMS (~45 km global model, updated hourly). Multi-year history from CPCB station data via aqinow.co pipeline (2016–2024, station-level daily records).
AQI Comparison
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Coimbatore | Gangtok |
|---|---|---|
| PM2.5(µg/m³) | 2.70 | 33.90 |
| PM10(µg/m³) | 2.90 | 43.50 |
| NO₂(µg/m³) | 4.50 | 5.10 |
| SO₂(µg/m³) | 2.20 | 2.80 |
| O₃(µg/m³) | 43.00 | 130.00 |
| CO(µg/m³) | 159.00 | 360.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Gangtok averaged 48 — a 18-point (38%) gap, with Coimbatore the more polluted and Gangtok the cleaner of the two. On 329 days when both cities reported, Gangtok was cleaner on 254 of them; the average daily gap was 33 AQI points.
Seasonality & days
Coimbatore peaks in November, while Gangtok peaks in March. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Gangtok was 0% Severe and 96.2% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Gangtok 94 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Gangtok has worsened by 14 AQI points (41.2%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Gangtok hit AQI 264 at Zero Point GICI (SSPCB) on 2023-01-16.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Gangtok spans 1 stations with a 0-point spread (min 50, max 50).
Verdict
🏆 Coimbatore has better air quality with an AQI of 5 compared to Gangtok's 57. That's a significant difference of 52 points.