Kishanganj vs Kollam
Side-by-side air quality comparison between Kishanganj 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 | Kishanganj | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 99.40 | 4.60 |
| PM10(µg/m³) | 102.00 | 7.10 |
| NO₂(µg/m³) | 19.70 | 4.40 |
| SO₂(µg/m³) | 12.20 | 1.50 |
| O₃(µg/m³) | 59.00 | 30.00 |
| CO(µg/m³) | 768.00 | 89.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kishanganj averaged an AQI of 144 while Kollam averaged 84 — a 60-point (71%) gap, with Kishanganj the more polluted and Kollam the cleaner of the two. On 802 days when both cities reported, Kollam was cleaner on 614 of them; the average daily gap was 85 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Kishanganj logged 0.2% Severe days and 37.099999999999994% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Kishanganj 23 days, Kollam 65 days.
Year-over-year progress
Kishanganj has improved by 136 AQI points (48.6%) from 2021 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Kishanganj reached AQI 417 at SDM Office Khagra (BSPCB) on 2022-02-01; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Kishanganj spans 1 CPCB stations with a 0-point spread (min 156, max 156); 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 Kishanganj's 232. That's a significant difference of 224 points.