Kolkata vs Rāichūr
Side-by-side air quality comparison between Kolkata and Rāichūr.
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 | Rāichūr |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 10.70 |
| PM10(µg/m³) | 69.40 | 15.10 |
| NO₂(µg/m³) | 18.10 | 8.60 |
| SO₂(µg/m³) | 13.10 | 3.00 |
| O₃(µg/m³) | 86.00 | 45.00 |
| CO(µg/m³) | 428.00 | 217.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Rāichūr averaged 106 — a 5-point (5%) gap, with Rāichūr the more polluted and Kolkata the cleaner of the two. On 783 days when both cities reported, Rāichūr was cleaner on 550 of them; the average daily gap was 78 AQI points.
Seasonality & days
Kolkata peaks in January, while Rāichūr peaks in February. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Rāichūr was 0% Severe and 54.1% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Rāichūr 23 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Rāichūr has improved by 24 AQI points (18.5%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Rāichūr hit AQI 390 at Haji Colony (KSPCB) on 2022-01-25.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Rāichūr spans 1 stations with a 0-point spread (min 93, max 93).
Verdict
🏆 Rāichūr has better air quality with an AQI of 18 compared to Kolkata's 117. That's a significant difference of 99 points.