Haldia vs Kollam
Side-by-side air quality comparison between Haldia 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 | Haldia | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 46.60 | 4.70 |
| PM10(µg/m³) | 51.90 | 7.20 |
| NO₂(µg/m³) | 11.40 | 4.00 |
| SO₂(µg/m³) | 10.40 | 1.50 |
| O₃(µg/m³) | 96.00 | 31.00 |
| CO(µg/m³) | 284.00 | 91.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Haldia averaged an AQI of 90 while Kollam averaged 84 — a 6-point (7%) gap, with Haldia the more polluted and Kollam the cleaner of the two. On 554 days when both cities reported, Haldia was cleaner on 306 of them; the average daily gap was 44 AQI points.
Seasonality & days
Haldia peaks in December, while Kollam peaks in January. Haldia logged 0% Severe days and 65.4% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Haldia 51 days, Kollam 65 days.
Year-over-year progress
Haldia has worsened by 8 AQI points (9.8%) from 2023 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Haldia reached AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Haldia spans 1 CPCB stations with a 0-point spread (min 86, max 86); 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 Haldia's 78. That's a significant difference of 70 points.