Hāveri vs Kolkata
Side-by-side air quality comparison between Hāveri 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 | Hāveri | Kolkata |
|---|---|---|
| PM2.5(µg/m³) | 3.50 | 41.40 |
| PM10(µg/m³) | 7.40 | 48.50 |
| NO₂(µg/m³) | 1.40 | 3.00 |
| SO₂(µg/m³) | 0.60 | 10.80 |
| O₃(µg/m³) | 72.00 | 166.00 |
| CO(µg/m³) | 114.00 | 367.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Hāveri averaged an AQI of 66 while Kolkata averaged 101 — a 35-point (53%) gap, with Kolkata the more polluted and Hāveri the cleaner of the two. On 467 days when both cities reported, Hāveri was cleaner on 392 of them; the average daily gap was 72 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Hāveri logged 0% Severe days and 86.69999999999999% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Hāveri 76 days, Kolkata 75 days.
Year-over-year progress
Hāveri has improved by 1 AQI points (1.5%) from 2022 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Hāveri reached AQI 262 at Ashwini Nagar (KSPCB) on 2023-11-17; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Hāveri spans 1 CPCB stations with a 0-point spread (min 68, max 68); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).
Verdict
🏆 Hāveri has better air quality with an AQI of 7 compared to Kolkata's 70. That's a significant difference of 63 points.