Ambala vs Howrah
Side-by-side air quality comparison between Ambala and Howrah.
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, Ambala averaged an AQI of 94 while Howrah averaged 126 — a 32-point (34%) gap, with Howrah the more polluted and Ambala the cleaner of the two. On 1683 days when both cities reported, Ambala was cleaner on 917 of them; the average daily gap was 79 AQI points.
Seasonality & days
Ambala peaks in November, while Howrah peaks in December. Ambala logged 0.2% Severe days and 46.5% Good-or-Satisfactory days; Howrah was 0.7% Severe and 48.7% Good-or-Satisfactory. Longest clean-air streaks: Ambala 44 days, Howrah 120 days.
Year-over-year progress
Ambala has improved by 52 AQI points (35.6%) from 2019 to 2024; Howrah has improved by 32 AQI points (20.3%) over the same window. The worst recorded day for Ambala reached AQI 452 at Patti Mehar (HSPCB) on 2020-11-04; Howrah hit AQI 500 at Ghusuri (WBPCB) on 2017-04-15.
Station-level disparity
Ambala spans 1 CPCB stations with a 0-point spread (min 126, max 126); Howrah spans 5 stations with a 116-point spread (min 111, max 227).