Howrah vs Kalyān
Side-by-side air quality comparison between Howrah and Kalyān.
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 Kalyān averaged 95 — a 31-point (33%) gap, with Howrah the more polluted and Kalyān the cleaner of the two. On 1414 days when both cities reported, Kalyān was cleaner on 927 of them; the average daily gap was 67 AQI points.
Seasonality & days
Howrah peaks in December, while Kalyān peaks in January. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Kalyān was 0.1% Severe and 46.4% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Kalyān 78 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Kalyān has improved by 4 AQI points (4%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Kalyān hit AQI 414 at Khadakpada (MPCB) on 2022-01-24.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Kalyān spans 2 stations with a 18-point spread (min 98, max 116).