Kolkata vs Tālcher
Side-by-side air quality comparison between Kolkata and Tālcher.
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 | Tālcher |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 66.60 |
| PM10(µg/m³) | 69.40 | 72.90 |
| NO₂(µg/m³) | 18.10 | 20.10 |
| SO₂(µg/m³) | 13.10 | 10.00 |
| O₃(µg/m³) | 86.00 | 60.00 |
| CO(µg/m³) | 428.00 | 471.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Tālcher averaged 127 — a 26-point (26%) gap, with Tālcher the more polluted and Kolkata the cleaner of the two. On 1307 days when both cities reported, Tālcher was cleaner on 810 of them; the average daily gap was 71 AQI points.
Seasonality & days
Kolkata peaks in January, while Tālcher peaks in December. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Tālcher was 0.2% Severe and 43.1% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Tālcher 44 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Tālcher has improved by 63 AQI points (33.2%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Tālcher hit AQI 414 at Talcher (OSPCB) on 2018-11-27.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Tālcher spans 1 stations with a 0-point spread (min 132, max 132).
Verdict
🏆 Kolkata has better air quality with an AQI of 117 compared to Tālcher's 123.