Kolkata vs Ujjain
Side-by-side air quality comparison between Kolkata and Ujjain.
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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Ujjain averaged 116 — a 15-point (15%) gap, with Ujjain the more polluted and Kolkata the cleaner of the two. On 1982 days when both cities reported, Ujjain was cleaner on 1061 of them; the average daily gap was 69 AQI points.
Seasonality & days
Kolkata peaks in January, while Ujjain peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Ujjain was 0.1% Severe and 33.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Ujjain 67 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Ujjain has improved by 71 AQI points (38%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Ujjain hit AQI 500 at Mahakaleshwar Temple (MPPCB) on 2023-03-10.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Ujjain spans 1 stations with a 0-point spread (min 131, max 131).