Kolkata vs Palwal
Side-by-side air quality comparison between Kolkata and Palwal.
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 | Palwal |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 62.40 |
| PM10(µg/m³) | 69.40 | 136.40 |
| NO₂(µg/m³) | 18.10 | 19.70 |
| SO₂(µg/m³) | 13.10 | 10.50 |
| O₃(µg/m³) | 86.00 | 66.00 |
| CO(µg/m³) | 428.00 | 503.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Palwal averaged 95 — a 6-point (6%) gap, with Kolkata the more polluted and Palwal the cleaner of the two. On 1607 days when both cities reported, Palwal was cleaner on 852 of them; the average daily gap was 79 AQI points.
Seasonality & days
Kolkata peaks in January, while Palwal peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Palwal was 0.2% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Palwal 37 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Palwal has improved by 91 AQI points (48.9%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Palwal hit AQI 465 at Shyam Nagar (HSPCB) on 2019-11-14.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Palwal spans 1 stations with a 0-point spread (min 120, max 120).
Verdict
🏆 Kolkata has better air quality with an AQI of 117 compared to Palwal's 125.