Chapra vs Kollam
Side-by-side air quality comparison between Chapra 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 | Chapra | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 99.00 | 4.60 |
| PM10(µg/m³) | 115.50 | 7.10 |
| NO₂(µg/m³) | 53.70 | 4.40 |
| SO₂(µg/m³) | 13.70 | 1.50 |
| O₃(µg/m³) | 10.00 | 30.00 |
| CO(µg/m³) | 858.00 | 89.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chapra averaged an AQI of 149 while Kollam averaged 84 — a 65-point (77%) gap, with Chapra the more polluted and Kollam the cleaner of the two. On 810 days when both cities reported, Kollam was cleaner on 718 of them; the average daily gap was 123 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Chapra logged 2.4% Severe days and 26.8% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Chapra 14 days, Kollam 65 days.
Year-over-year progress
Chapra has improved by 181 AQI points (54.8%) from 2021 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Chapra reached AQI 452 at Darshan Nagar (BSPCB) on 2022-12-20; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Chapra spans 1 CPCB stations with a 0-point spread (min 195, max 195); Kollam spans 1 stations with a 0-point spread (min 84, max 84).
Verdict
🏆 Kollam has better air quality with an AQI of 8 compared to Chapra's 231. That's a significant difference of 223 points.