Gangtok vs Purnia
Side-by-side air quality comparison between Gangtok and Purnia.
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 | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 33.90 | 105.90 |
| PM10(µg/m³) | 43.50 | 109.00 |
| NO₂(µg/m³) | 5.10 | 25.20 |
| SO₂(µg/m³) | 2.80 | 20.10 |
| O₃(µg/m³) | 130.00 | 67.00 |
| CO(µg/m³) | 360.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gangtok averaged an AQI of 48 while Purnia averaged 133 — a 85-point (177%) gap, with Purnia the more polluted and Gangtok the cleaner of the two. On 609 days when both cities reported, Gangtok was cleaner on 586 of them; the average daily gap was 124 AQI points.
Seasonality & days
Gangtok peaks in March, while Purnia peaks in January. Gangtok logged 0% Severe days and 96.2% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Gangtok 94 days, Purnia 14 days.
Year-over-year progress
Gangtok has worsened by 14 AQI points (41.2%) from 2022 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Gangtok reached AQI 264 at Zero Point GICI (SSPCB) on 2023-01-16; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Gangtok spans 1 CPCB stations with a 0-point spread (min 50, max 50); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Gangtok has better air quality with an AQI of 57 compared to Purnia's 253. That's a significant difference of 196 points.