Patna vs Siliguri
Side-by-side air quality comparison between Patna and Siliguri.
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 | Patna | Siliguri |
|---|---|---|
| CO(ppb) | 535.21 | 382.00 |
| NO2(ppb) | 8.87 | 2.00 |
| O3(ppb) | 28.54 | 172.00 |
| PM10(µg/m³) | 179.29 | 71.50 |
| PM2.5(µg/m³) | 67.06 | 57.70 |
| SO2(ppb) | 3.87 | 8.70 |
| NH3(ppb) | 22.20 | — |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Patna averaged an AQI of 172 while Siliguri averaged 81 — a 91-point (112%) gap, with Patna the more polluted and Siliguri the cleaner of the two. On 1843 days when both cities reported, Siliguri was cleaner on 1752 of them; the average daily gap was 119 AQI points.
Seasonality & days
Patna peaks in December, while Siliguri peaks in February. Patna logged 7.5% Severe days and 19.400000000000002% Good-or-Satisfactory days; Siliguri was 0.1% Severe and 61.8% Good-or-Satisfactory. Longest clean-air streaks: Patna 30 days, Siliguri 180 days.
Year-over-year progress
Patna has improved by 40 AQI points (18.9%) from 2016 to 2024; Siliguri has improved by 39 AQI points (32.5%) over the same window. The worst recorded day for Patna reached AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01; Siliguri hit AQI 415 at Ward-32 Bapupara (WBPCB) on 2018-02-08.
Station-level disparity
Patna spans 6 CPCB stations with a 39-point spread (min 154, max 193); Siliguri spans 1 stations with a 0-point spread (min 107, max 107).
Verdict
🏆 Siliguri has better air quality with an AQI of 96 compared to Patna's 153. That's a significant difference of 57 points.