Haldia vs Thiruvananthapuram
Side-by-side air quality comparison between Haldia and Thiruvananthapuram.
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 | Thiruvananthapuram |
|---|---|---|
| PM2.5(µg/m³) | 50.20 | 5.50 |
| PM10(µg/m³) | 55.20 | 10.00 |
| NO₂(µg/m³) | 14.30 | 1.70 |
| SO₂(µg/m³) | 9.50 | 0.50 |
| O₃(µg/m³) | 79.00 | 37.00 |
| CO(µg/m³) | 280.00 | 85.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Haldia averaged an AQI of 90 while Thiruvananthapuram averaged 56 — a 34-point (61%) gap, with Haldia the more polluted and Thiruvananthapuram the cleaner of the two. On 358 days when both cities reported, Haldia was cleaner on 182 of them; the average daily gap was 45 AQI points.
Seasonality & days
Haldia peaks in December, while Thiruvananthapuram peaks in January. Haldia logged 0% Severe days and 65.4% Good-or-Satisfactory days; Thiruvananthapuram was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Haldia 51 days, Thiruvananthapuram 172 days.
Year-over-year progress
Haldia has worsened by 8 AQI points (9.8%) from 2023 to 2024; Thiruvananthapuram has improved by 11 AQI points (16.4%) over the same window. The worst recorded day for Haldia reached AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26; Thiruvananthapuram hit AQI 387 at Plammoodu Thiruvananthapuram (PCB) on 2021-08-30.
Station-level disparity
Haldia spans 1 CPCB stations with a 0-point spread (min 86, max 86); Thiruvananthapuram spans 2 stations with a 7-point spread (min 57, max 64).
Verdict
🏆 Thiruvananthapuram has better air quality with an AQI of 10 compared to Haldia's 84. That's a significant difference of 74 points.