Haldia vs Tiruchirappalli
Side-by-side air quality comparison between Haldia and Tiruchirappalli.
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 | Tiruchirappalli |
|---|---|---|
| PM2.5(µg/m³) | 46.60 | 5.60 |
| PM10(µg/m³) | 51.90 | 6.40 |
| NO₂(µg/m³) | 11.40 | 6.80 |
| SO₂(µg/m³) | 10.40 | 3.40 |
| O₃(µg/m³) | 96.00 | 40.00 |
| CO(µg/m³) | 284.00 | 134.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Haldia averaged an AQI of 90 while Tiruchirappalli averaged 50 — a 40-point (80%) gap, with Haldia the more polluted and Tiruchirappalli the cleaner of the two. On 87 days when both cities reported, Tiruchirappalli was cleaner on 84 of them; the average daily gap was 89 AQI points.
Seasonality & days
Haldia peaks in December, while Tiruchirappalli peaks in January. Haldia logged 0% Severe days and 65.4% Good-or-Satisfactory days; Tiruchirappalli was 0% Severe and 96.5% Good-or-Satisfactory. Longest clean-air streaks: Haldia 51 days, Tiruchirappalli 46 days.
Year-over-year progress
Haldia has worsened by 8 AQI points (9.8%) from 2023 to 2024; Tiruchirappalli has improved by 23 AQI points (31.5%) over the same window. The worst recorded day for Haldia reached AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26; Tiruchirappalli hit AQI 114 at St Joseph College (TNPCB) on 2024-01-14.
Station-level disparity
Haldia spans 1 CPCB stations with a 0-point spread (min 86, max 86); Tiruchirappalli spans 1 stations with a 0-point spread (min 52, max 52).
Verdict
🏆 Tiruchirappalli has better air quality with an AQI of 9 compared to Haldia's 78. That's a significant difference of 69 points.