Kollam vs Motihari
Side-by-side air quality comparison between Kollam and Motihari.
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 | Kollam | Motihari |
|---|---|---|
| PM2.5(µg/m³) | 4.60 | 156.00 |
| PM10(µg/m³) | 7.10 | 175.10 |
| NO₂(µg/m³) | 4.40 | 76.90 |
| SO₂(µg/m³) | 1.50 | 22.40 |
| O₃(µg/m³) | 30.00 | 0.00 |
| CO(µg/m³) | 89.00 | 1456.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kollam averaged an AQI of 84 while Motihari averaged 116 — a 32-point (38%) gap, with Motihari the more polluted and Kollam the cleaner of the two. On 814 days when both cities reported, Kollam was cleaner on 624 of them; the average daily gap was 86 AQI points.
Seasonality & days
Kollam peaks in January, while Motihari peaks in November. Kollam logged 0% Severe days and 81% Good-or-Satisfactory days; Motihari was 1.2% Severe and 39.1% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Motihari 26 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Motihari has improved by 106 AQI points (47.7%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Motihari hit AQI 448 at Gandak Colony (BSPCB) on 2022-11-17.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Motihari spans 1 stations with a 0-point spread (min 153, max 153).
Verdict
🏆 Kollam has better air quality with an AQI of 8 compared to Motihari's 328. That's a significant difference of 320 points.