Hapur vs Kolkata
Side-by-side air quality comparison between Hapur and Kolkata.
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 | Hapur | Kolkata |
|---|---|---|
| PM2.5(µg/m³) | 71.90 | 68.70 |
| PM10(µg/m³) | 97.30 | 72.60 |
| NO₂(µg/m³) | 36.60 | 22.20 |
| SO₂(µg/m³) | 11.50 | 11.50 |
| O₃(µg/m³) | 36.00 | 55.00 |
| CO(µg/m³) | 589.00 | 364.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Hapur averaged an AQI of 142 while Kolkata averaged 101 — a 41-point (41%) gap, with Hapur the more polluted and Kolkata the cleaner of the two. On 1692 days when both cities reported, Kolkata was cleaner on 883 of them; the average daily gap was 80 AQI points.
Seasonality & days
Hapur peaks in November, while Kolkata peaks in January. Hapur logged 1.9% Severe days and 36.2% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Hapur 55 days, Kolkata 75 days.
Year-over-year progress
Hapur has improved by 197 AQI points (58.1%) from 2018 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Hapur reached AQI 477 at Anand Vihar (UPPCB) on 2019-10-31; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Hapur spans 1 CPCB stations with a 0-point spread (min 159, max 159); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).
Verdict
🏆 Kolkata has better air quality with an AQI of 130 compared to Hapur's 140.