Haldia vs Nagapattinam
Side-by-side air quality comparison between Haldia and Nagapattinam.
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 | Nagapattinam |
|---|---|---|
| PM2.5(µg/m³) | 50.20 | 12.00 |
| PM10(µg/m³) | 55.20 | 15.60 |
| NO₂(µg/m³) | 14.30 | 10.70 |
| SO₂(µg/m³) | 9.50 | 3.80 |
| O₃(µg/m³) | 79.00 | 35.00 |
| CO(µg/m³) | 280.00 | 206.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Haldia averaged an AQI of 90 while Nagapattinam averaged 60 — a 30-point (50%) gap, with Haldia the more polluted and Nagapattinam the cleaner of the two. On 47 days when both cities reported, Nagapattinam was cleaner on 40 of them; the average daily gap was 82 AQI points.
Seasonality & days
Haldia peaks in December, while Nagapattinam peaks in November. Haldia logged 0% Severe days and 65.4% Good-or-Satisfactory days; Nagapattinam was 0% Severe and 91.5% Good-or-Satisfactory. Longest clean-air streaks: Haldia 51 days, Nagapattinam 8 days.
Year-over-year progress
The worst recorded day for Haldia reached AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26; Nagapattinam hit AQI 113 at Velippalayam (TNPCB) on 2024-12-16.
Station-level disparity
Haldia spans 1 CPCB stations with a 0-point spread (min 86, max 86); Nagapattinam spans 1 stations with a 0-point spread (min 60, max 60).
Verdict
🏆 Nagapattinam has better air quality with an AQI of 20 compared to Haldia's 84. That's a significant difference of 64 points.