Imphal vs Kolkata
Side-by-side air quality comparison between Imphal 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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Imphal averaged an AQI of 110 while Kolkata averaged 101 — a 9-point (9%) gap, with Imphal the more polluted and Kolkata the cleaner of the two. On 551 days when both cities reported, Kolkata was cleaner on 279 of them; the average daily gap was 65 AQI points.
Seasonality & days
Imphal peaks in October, while Kolkata peaks in January. Imphal logged 1.1% Severe days and 49.400000000000006% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Imphal 103 days, Kolkata 75 days.
Year-over-year progress
Imphal has worsened by 23 AQI points (26.4%) from 2022 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Imphal reached AQI 500 at University Imphal (PCB) on 2024-10-11; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Imphal spans 2 CPCB stations with a 4-point spread (min 97, max 101); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).