Darbhanga vs Kollam
Side-by-side air quality comparison between Darbhanga 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
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Darbhanga | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 111.50 | 5.50 |
| PM10(µg/m³) | 122.90 | 7.90 |
| NO₂(µg/m³) | 42.70 | 3.80 |
| SO₂(µg/m³) | 18.40 | 1.60 |
| O₃(µg/m³) | 61.00 | 33.00 |
| CO(µg/m³) | 767.00 | 96.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2023, Darbhanga averaged an AQI of 365 while Kollam averaged 84 — a 281-point (335%) gap, with Darbhanga the more polluted and Kollam the cleaner of the two. On 370 days when both cities reported, Kollam was cleaner on 319 of them; the average daily gap was 132 AQI points.
Seasonality & days
Darbhanga peaks in December, while Kollam peaks in January. Darbhanga logged 7.1% Severe days and 26.9% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Darbhanga 20 days, Kollam 65 days.
Year-over-year progress
Darbhanga has worsened by 116 AQI points (46.6%) from 2021 to 2023; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Darbhanga reached AQI 473 at Town Hall Lal Bagh (BSPCB) on 2023-01-01; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Darbhanga spans 1 CPCB stations with a 0-point spread (min 208, max 208); Kollam spans 1 stations with a 0-point spread (min 84, max 84).
Verdict
🏆 Kollam has better air quality with an AQI of 9 compared to Darbhanga's 272. That's a significant difference of 263 points.