Howrah vs Patna
Side-by-side air quality comparison between Howrah 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, Howrah averaged an AQI of 126 while Patna averaged 172 — a 46-point (37%) gap, with Patna the more polluted and Howrah the cleaner of the two. On 2226 days when both cities reported, Howrah was cleaner on 1834 of them; the average daily gap was 77 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Patna was 7.5% Severe and 19.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Patna 30 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Patna has improved by 40 AQI points (18.9%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Patna hit AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Patna spans 6 stations with a 39-point spread (min 154, max 193).