Haldia vs Nārnaul
Side-by-side air quality comparison between Haldia and Nārnaul.
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 | Nārnaul |
|---|---|---|
| PM2.5(µg/m³) | 46.60 | 45.40 |
| PM10(µg/m³) | 51.90 | 126.20 |
| NO₂(µg/m³) | 11.40 | 12.40 |
| SO₂(µg/m³) | 10.40 | 7.70 |
| O₃(µg/m³) | 96.00 | 86.00 |
| CO(µg/m³) | 284.00 | 365.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Haldia averaged an AQI of 90 while Nārnaul averaged 94 — a 4-point (4%) gap, with Nārnaul the more polluted and Haldia the cleaner of the two. On 598 days when both cities reported, Haldia was cleaner on 421 of them; the average daily gap was 54 AQI points.
Seasonality & days
Haldia peaks in December, while Nārnaul peaks in November. Haldia logged 0% Severe days and 65.4% Good-or-Satisfactory days; Nārnaul was 0.1% Severe and 40.8% Good-or-Satisfactory. Longest clean-air streaks: Haldia 51 days, Nārnaul 63 days.
Year-over-year progress
Haldia has worsened by 8 AQI points (9.8%) from 2023 to 2024; Nārnaul has improved by 37 AQI points (28.2%) over the same window. The worst recorded day for Haldia reached AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26; Nārnaul hit AQI 435 at Shastri Nagar (HSPCB) on 2023-11-16.
Station-level disparity
Haldia spans 1 CPCB stations with a 0-point spread (min 86, max 86); Nārnaul spans 1 stations with a 0-point spread (min 130, max 130).
Verdict
🏆 Haldia has better air quality with an AQI of 78 compared to Nārnaul's 118.