Gwalior vs Kollam
Side-by-side air quality comparison between Gwalior and Kollam.
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, Gwalior averaged an AQI of 136 while Kollam averaged 84 — a 52-point (62%) gap, with Gwalior the more polluted and Kollam the cleaner of the two. On 1081 days when both cities reported, Kollam was cleaner on 864 of them; the average daily gap was 83 AQI points.
Seasonality & days
Gwalior peaks in November, while Kollam peaks in January. Gwalior logged 0.4% Severe days and 31.5% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Gwalior 47 days, Kollam 65 days.
Year-over-year progress
Gwalior has improved by 12 AQI points (8.1%) from 2020 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Gwalior reached AQI 450 at City Center (MPPCB) on 2021-11-09; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Gwalior spans 4 CPCB stations with a 53-point spread (min 112, max 165); Kollam spans 1 stations with a 0-point spread (min 84, max 84).