Gangtok vs Howrah
Side-by-side air quality comparison between Gangtok and Howrah.
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 | Howrah |
|---|---|---|
| PM2.5(µg/m³) | 35.70 | 64.70 |
| PM10(µg/m³) | 45.20 | 69.40 |
| NO₂(µg/m³) | 8.70 | 18.10 |
| SO₂(µg/m³) | 2.60 | 13.10 |
| O₃(µg/m³) | 112.00 | 86.00 |
| CO(µg/m³) | 461.00 | 421.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gangtok averaged an AQI of 48 while Howrah averaged 126 — a 78-point (163%) gap, with Howrah the more polluted and Gangtok the cleaner of the two. On 457 days when both cities reported, Gangtok was cleaner on 447 of them; the average daily gap was 107 AQI points.
Seasonality & days
Gangtok peaks in March, while Howrah peaks in December. Gangtok logged 0% Severe days and 96.2% Good-or-Satisfactory days; Howrah was 0.7% Severe and 48.7% Good-or-Satisfactory. Longest clean-air streaks: Gangtok 94 days, Howrah 120 days.
Year-over-year progress
Gangtok has worsened by 14 AQI points (41.2%) from 2022 to 2024; Howrah has improved by 32 AQI points (20.3%) over the same window. The worst recorded day for Gangtok reached AQI 264 at Zero Point GICI (SSPCB) on 2023-01-16; Howrah hit AQI 500 at Ghusuri (WBPCB) on 2017-04-15.
Station-level disparity
Gangtok spans 1 CPCB stations with a 0-point spread (min 50, max 50); Howrah spans 5 stations with a 116-point spread (min 111, max 227).
Verdict
🏆 Gangtok has better air quality with an AQI of 60 compared to Howrah's 117. That's a significant difference of 57 points.