Kollam vs Rohtak
Side-by-side air quality comparison between Kollam and Rohtak.
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, Kollam averaged an AQI of 84 while Rohtak averaged 148 — a 64-point (76%) gap, with Rohtak the more polluted and Kollam the cleaner of the two. On 1328 days when both cities reported, Kollam was cleaner on 1003 of them; the average daily gap was 88 AQI points.
Seasonality & days
Kollam peaks in January, while Rohtak peaks in November. Kollam logged 0% Severe days and 81% Good-or-Satisfactory days; Rohtak was 1.1% Severe and 36.599999999999994% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Rohtak 45 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Rohtak has improved by 123 AQI points (45.4%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Rohtak hit AQI 498 at MD University (HSPCB) on 2019-11-03.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Rohtak spans 1 stations with a 0-point spread (min 159, max 159).