Hajipur vs Kollam
Side-by-side air quality comparison between Hajipur 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, Hajipur averaged an AQI of 173 while Kollam averaged 84 — a 89-point (106%) gap, with Hajipur the more polluted and Kollam the cleaner of the two. On 1295 days when both cities reported, Kollam was cleaner on 1001 of them; the average daily gap was 82 AQI points.
Seasonality & days
Hajipur peaks in December, while Kollam peaks in January. Hajipur logged 0.3% Severe days and 36.6% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Hajipur 36 days, Kollam 65 days.
Year-over-year progress
Hajipur has worsened by 74 AQI points (74.7%) from 2020 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Hajipur reached AQI 427 at Industrial Area (BSPCB) on 2024-11-12; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Hajipur spans 1 CPCB stations with a 0-point spread (min 149, max 149); Kollam spans 1 stations with a 0-point spread (min 84, max 84).