Ambala vs Kollam
Side-by-side air quality comparison between Ambala 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 | Ambala | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 47.60 | 4.60 |
| PM10(µg/m³) | 70.10 | 7.10 |
| NO₂(µg/m³) | 23.90 | 4.40 |
| SO₂(µg/m³) | 10.30 | 1.50 |
| O₃(µg/m³) | 56.00 | 30.00 |
| CO(µg/m³) | 618.00 | 89.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ambala averaged an AQI of 94 while Kollam averaged 84 — a 10-point (12%) gap, with Ambala the more polluted and Kollam the cleaner of the two. On 1294 days when both cities reported, Kollam was cleaner on 911 of them; the average daily gap was 59 AQI points.
Seasonality & days
Ambala peaks in November, while Kollam peaks in January. Ambala logged 0.2% Severe days and 46.5% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Ambala 44 days, Kollam 65 days.
Year-over-year progress
Ambala has improved by 52 AQI points (35.6%) from 2019 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Ambala reached AQI 452 at Patti Mehar (HSPCB) on 2020-11-04; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Ambala spans 1 CPCB stations with a 0-point spread (min 126, max 126); 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 Ambala's 80. That's a significant difference of 72 points.