Gangtok vs Tiruchirappalli
Side-by-side air quality comparison between Gangtok and Tiruchirappalli.
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 | Gangtok | Tiruchirappalli |
|---|---|---|
| PM2.5(µg/m³) | 33.90 | 5.60 |
| PM10(µg/m³) | 43.50 | 6.40 |
| NO₂(µg/m³) | 5.10 | 6.80 |
| SO₂(µg/m³) | 2.80 | 3.40 |
| O₃(µg/m³) | 130.00 | 40.00 |
| CO(µg/m³) | 360.00 | 134.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gangtok averaged an AQI of 48 while Tiruchirappalli averaged 50 — a 2-point (4%) gap, with Tiruchirappalli the more polluted and Gangtok the cleaner of the two. On 46 days when both cities reported, Gangtok was cleaner on 28 of them; the average daily gap was 21 AQI points.
Seasonality & days
Gangtok peaks in March, while Tiruchirappalli peaks in January. Gangtok logged 0% Severe days and 96.2% Good-or-Satisfactory days; Tiruchirappalli was 0% Severe and 96.5% Good-or-Satisfactory. Longest clean-air streaks: Gangtok 94 days, Tiruchirappalli 46 days.
Year-over-year progress
Gangtok has worsened by 14 AQI points (41.2%) from 2022 to 2024; Tiruchirappalli has improved by 23 AQI points (31.5%) over the same window. The worst recorded day for Gangtok reached AQI 264 at Zero Point GICI (SSPCB) on 2023-01-16; Tiruchirappalli hit AQI 114 at St Joseph College (TNPCB) on 2024-01-14.
Station-level disparity
Gangtok spans 1 CPCB stations with a 0-point spread (min 50, max 50); Tiruchirappalli spans 1 stations with a 0-point spread (min 52, max 52).
Verdict
🏆 Tiruchirappalli has better air quality with an AQI of 9 compared to Gangtok's 57.