Kalyān vs Patna
Side-by-side air quality comparison between Kalyān 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 | Kalyān | Patna |
|---|---|---|
| PM2.5(µg/m³) | 22.80 | 97.80 |
| PM10(µg/m³) | 40.50 | 109.40 |
| NO₂(µg/m³) | 23.40 | 40.50 |
| SO₂(µg/m³) | 22.10 | 18.90 |
| O₃(µg/m³) | 18.00 | 52.00 |
| CO(µg/m³) | 187.00 | 667.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kalyān averaged an AQI of 95 while Patna averaged 172 — a 77-point (81%) gap, with Patna the more polluted and Kalyān the cleaner of the two. On 1386 days when both cities reported, Kalyān was cleaner on 1278 of them; the average daily gap was 109 AQI points.
Seasonality & days
Kalyān peaks in January, while Patna peaks in December. Kalyān logged 0.1% Severe days and 46.4% Good-or-Satisfactory days; Patna was 7.5% Severe and 19.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Kalyān 78 days, Patna 30 days.
Year-over-year progress
Kalyān has improved by 4 AQI points (4%) from 2019 to 2024; Patna has improved by 40 AQI points (18.9%) over the same window. The worst recorded day for Kalyān reached AQI 414 at Khadakpada (MPCB) on 2022-01-24; Patna hit AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01.
Station-level disparity
Kalyān spans 2 CPCB stations with a 18-point spread (min 98, max 116); Patna spans 6 stations with a 39-point spread (min 154, max 193).
Verdict
🏆 Kalyān has better air quality with an AQI of 41 compared to Patna's 227. That's a significant difference of 186 points.