Coimbatore vs Haldia
Side-by-side air quality comparison between Coimbatore and Haldia.
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 | Coimbatore | Haldia |
|---|---|---|
| PM2.5(µg/m³) | 2.70 | 46.60 |
| PM10(µg/m³) | 2.90 | 51.90 |
| NO₂(µg/m³) | 4.50 | 11.40 |
| SO₂(µg/m³) | 2.20 | 10.40 |
| O₃(µg/m³) | 43.00 | 96.00 |
| CO(µg/m³) | 159.00 | 284.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Haldia averaged 90 — a 24-point (36%) gap, with Haldia the more polluted and Coimbatore the cleaner of the two. On 289 days when both cities reported, Coimbatore was cleaner on 188 of them; the average daily gap was 46 AQI points.
Seasonality & days
Coimbatore peaks in November, while Haldia peaks in December. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Haldia was 0% Severe and 65.4% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Haldia 51 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Haldia has worsened by 8 AQI points (9.8%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Haldia hit AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Haldia spans 1 stations with a 0-point spread (min 86, max 86).
Verdict
🏆 Coimbatore has better air quality with an AQI of 5 compared to Haldia's 78. That's a significant difference of 73 points.