Kolkata vs Sonipat
Side-by-side air quality comparison between Kolkata and Sonipat.
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 | Kolkata | Sonipat |
|---|---|---|
| PM2.5(µg/m³) | 43.70 | 78.50 |
| PM10(µg/m³) | 51.30 | 302.70 |
| NO₂(µg/m³) | 2.40 | 5.40 |
| SO₂(µg/m³) | 11.70 | 29.40 |
| O₃(µg/m³) | 180.00 | 249.00 |
| CO(µg/m³) | 355.00 | 288.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Sonipat averaged 134 — a 33-point (33%) gap, with Sonipat the more polluted and Kolkata the cleaner of the two. On 1530 days when both cities reported, Kolkata was cleaner on 820 of them; the average daily gap was 82 AQI points.
Seasonality & days
Kolkata peaks in January, while Sonipat peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Sonipat was 0.8% Severe and 26.5% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Sonipat 21 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Sonipat has improved by 220 AQI points (62.1%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Sonipat hit AQI 455 at Murthal (HSPCB) on 2023-11-03.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Sonipat spans 1 stations with a 0-point spread (min 162, max 162).
Verdict
🏆 Kolkata has better air quality with an AQI of 73 compared to Sonipat's 253. That's a significant difference of 180 points.