Kollam vs Samastipur
Side-by-side air quality comparison between Kollam and Samastipur.
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 | Samastipur |
|---|---|---|
| PM2.5(µg/m³) | 4.60 | 118.00 |
| PM10(µg/m³) | 7.10 | 134.60 |
| NO₂(µg/m³) | 4.40 | 61.60 |
| SO₂(µg/m³) | 1.50 | 18.30 |
| O₃(µg/m³) | 30.00 | 5.00 |
| CO(µg/m³) | 89.00 | 837.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kollam averaged an AQI of 84 while Samastipur averaged 134 — a 50-point (60%) gap, with Samastipur the more polluted and Kollam the cleaner of the two. On 656 days when both cities reported, Kollam was cleaner on 570 of them; the average daily gap was 107 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Kollam logged 0% Severe days and 81% Good-or-Satisfactory days; Samastipur was 1.4% Severe and 23.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Samastipur 9 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Samastipur has improved by 84 AQI points (38.5%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Samastipur hit AQI 459 at DM Office Kasipur (BSPCB) on 2023-01-01.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Samastipur spans 1 stations with a 0-point spread (min 177, max 177).
Verdict
🏆 Kollam has better air quality with an AQI of 8 compared to Samastipur's 293. That's a significant difference of 285 points.