Charkhi Dādri vs Kollam
Side-by-side air quality comparison between Charkhi Dādri 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 | Charkhi Dādri | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 5.50 |
| PM10(µg/m³) | 194.20 | 7.90 |
| NO₂(µg/m³) | 12.60 | 3.80 |
| SO₂(µg/m³) | 9.40 | 1.60 |
| O₃(µg/m³) | 83.00 | 33.00 |
| CO(µg/m³) | 490.00 | 96.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Charkhi Dādri averaged an AQI of 145 while Kollam averaged 84 — a 61-point (73%) gap, with Charkhi Dādri the more polluted and Kollam the cleaner of the two. On 1244 days when both cities reported, Kollam was cleaner on 1004 of them; the average daily gap was 89 AQI points.
Seasonality & days
Charkhi Dādri peaks in November, while Kollam peaks in January. Charkhi Dādri logged 0.7% Severe days and 28% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Charkhi Dādri 48 days, Kollam 65 days.
Year-over-year progress
Charkhi Dādri has improved by 51 AQI points (26%) from 2020 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Charkhi Dādri reached AQI 470 at Mini Secretariat Charkhi (HSPCB) on 2021-11-12; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Charkhi Dādri spans 1 CPCB stations with a 0-point spread (min 162, max 162); 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 Charkhi Dādri's 163. That's a significant difference of 154 points.