Haldia vs Katihar
Side-by-side air quality comparison between Haldia and Katihar.
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 | Katihar |
|---|---|---|
| PM2.5(µg/m³) | 49.00 | 109.20 |
| PM10(µg/m³) | 53.80 | 114.30 |
| NO₂(µg/m³) | 14.40 | 31.10 |
| SO₂(µg/m³) | 8.90 | 18.30 |
| O₃(µg/m³) | 77.00 | 43.00 |
| CO(µg/m³) | 273.00 | 770.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Haldia averaged an AQI of 90 while Katihar averaged 123 — a 33-point (37%) gap, with Katihar the more polluted and Haldia the cleaner of the two. On 600 days when both cities reported, Haldia was cleaner on 497 of them; the average daily gap was 83 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Haldia logged 0% Severe days and 65.4% Good-or-Satisfactory days; Katihar was 3.1% Severe and 26.9% Good-or-Satisfactory. Longest clean-air streaks: Haldia 51 days, Katihar 19 days.
Year-over-year progress
Haldia has worsened by 8 AQI points (9.8%) from 2023 to 2024; Katihar has improved by 188 AQI points (60.5%) over the same window. The worst recorded day for Haldia reached AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26; Katihar hit AQI 465 at Mirchaibari (BSPCB) on 2023-01-23.
Station-level disparity
Haldia spans 1 CPCB stations with a 0-point spread (min 86, max 86); Katihar spans 1 stations with a 0-point spread (min 185, max 185).
Verdict
🏆 Haldia has better air quality with an AQI of 82 compared to Katihar's 264. That's a significant difference of 182 points.