Gaya vs Kolkata
Side-by-side air quality comparison between Gaya 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 | Gaya | Kolkata |
|---|---|---|
| PM2.5(µg/m³) | 55.80 | 71.70 |
| PM10(µg/m³) | 65.20 | 75.70 |
| NO₂(µg/m³) | 19.80 | 22.30 |
| SO₂(µg/m³) | 12.00 | 12.00 |
| O₃(µg/m³) | 63.00 | 60.00 |
| CO(µg/m³) | 335.00 | 392.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gaya averaged an AQI of 110 while Kolkata averaged 101 — a 9-point (9%) gap, with Gaya the more polluted and Kolkata the cleaner of the two. On 1981 days when both cities reported, Kolkata was cleaner on 1086 of them; the average daily gap was 63 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Gaya logged 1.7% Severe days and 32% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Gaya 52 days, Kolkata 75 days.
Year-over-year progress
Gaya has improved by 89 AQI points (44.7%) from 2016 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Gaya reached AQI 500 at Collectorate (BSPCB) on 2016-10-15; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Gaya spans 3 CPCB stations with a 85-point spread (min 88, max 173); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).
Verdict
🏆 Gaya has better air quality with an AQI of 93 compared to Kolkata's 140.