Asansol vs Patna
Side-by-side air quality comparison between Asansol and Patna.
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 | Asansol | Patna |
|---|---|---|
| PM2.5(µg/m³) | 64.50 | 67.06 |
| PM10(µg/m³) | 79.60 | 179.29 |
| NO₂(µg/m³) | 8.30 | 8.87 |
| SO₂(µg/m³) | 53.60 | 3.87 |
| O₃(µg/m³) | 248.00 | 28.54 |
| CO(µg/m³) | 418.00 | 535.21 |
| NH3(ppb) | — | 22.20 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Asansol averaged an AQI of 145 while Patna averaged 172 — a 27-point (19%) gap, with Patna the more polluted and Asansol the cleaner of the two. On 1911 days when both cities reported, Asansol was cleaner on 1774 of them; the average daily gap was 88 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Asansol logged 0% Severe days and 43.3% Good-or-Satisfactory days; Patna was 7.5% Severe and 19.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Asansol 44 days, Patna 30 days.
Year-over-year progress
Asansol has worsened by 12 AQI points (9%) from 2018 to 2024; Patna has improved by 40 AQI points (18.9%) over the same window. The worst recorded day for Asansol reached AQI 394 at Court Area (WBPCB) on 2022-12-13; Patna hit AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01.
Station-level disparity
Asansol spans 4 CPCB stations with a 40-point spread (min 123, max 163); Patna spans 6 stations with a 39-point spread (min 154, max 193).
Verdict
🏆 Asansol has better air quality with an AQI of 116 compared to Patna's 153.