Haldia vs Patna
Side-by-side air quality comparison between Haldia and Patna.
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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Haldia averaged an AQI of 90 while Patna averaged 172 — a 82-point (91%) gap, with Patna the more polluted and Haldia the cleaner of the two. On 701 days when both cities reported, Haldia was cleaner on 699 of them; the average daily gap was 164 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; Patna was 7.5% Severe and 19.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Haldia 51 days, Patna 30 days.
Year-over-year progress
Haldia has worsened by 8 AQI points (9.8%) from 2023 to 2024; Patna has improved by 40 AQI points (18.9%) over the same window. The worst recorded day for Haldia reached AQI 322 at Priyambada Housing Estate (WBPCB) on 2024-11-26; Patna hit AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01.
Station-level disparity
Haldia spans 1 CPCB stations with a 0-point spread (min 86, max 86); Patna spans 6 stations with a 39-point spread (min 154, max 193).