Ariyalur vs Kolkata
Side-by-side air quality comparison between Ariyalur 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, Ariyalur averaged an AQI of 46 while Kolkata averaged 101 — a 55-point (120%) gap, with Kolkata the more polluted and Ariyalur the cleaner of the two. On 314 days when both cities reported, Ariyalur was cleaner on 303 of them; the average daily gap was 86 AQI points.
Seasonality & days
Ariyalur peaks in March, while Kolkata peaks in January. Ariyalur logged 0% Severe days and 93.8% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Ariyalur 57 days, Kolkata 75 days.
Year-over-year progress
Ariyalur has improved by 35 AQI points (43.2%) from 2022 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Ariyalur reached AQI 221 at Keelapalur (TNPCB) on 2024-04-07; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Ariyalur spans 1 CPCB stations with a 0-point spread (min 51, max 51); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).