Chandigarh vs Patna
Side-by-side air quality comparison between Chandigarh 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 | Chandigarh | Patna |
|---|---|---|
| PM2.5(µg/m³) | 49.00 | 99.00 |
| PM10(µg/m³) | 64.70 | 111.80 |
| NO₂(µg/m³) | 40.20 | 49.30 |
| SO₂(µg/m³) | 8.40 | 18.10 |
| O₃(µg/m³) | 23.00 | 19.00 |
| CO(µg/m³) | 678.00 | 704.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chandigarh averaged an AQI of 153 while Patna averaged 172 — a 19-point (12%) gap, with Patna the more polluted and Chandigarh the cleaner of the two. On 1925 days when both cities reported, Chandigarh was cleaner on 1629 of them; the average daily gap was 104 AQI points.
Seasonality & days
Chandigarh peaks in January, while Patna peaks in December. Chandigarh logged 0.3% Severe days and 39.9% Good-or-Satisfactory days; Patna was 7.5% Severe and 19.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Chandigarh 92 days, Patna 30 days.
Year-over-year progress
Chandigarh has worsened by 27 AQI points (21.4%) from 2019 to 2024; Patna has improved by 40 AQI points (18.9%) over the same window. The worst recorded day for Chandigarh reached AQI 452 at Sector-53 (CPCC) on 2022-11-09; Patna hit AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01.
Station-level disparity
Chandigarh spans 3 CPCB stations with a 43-point spread (min 107, max 150); Patna spans 6 stations with a 39-point spread (min 154, max 193).
Verdict
🏆 Chandigarh has better air quality with an AQI of 82 compared to Patna's 231. That's a significant difference of 149 points.