Howrah vs Perundurai
Side-by-side air quality comparison between Howrah and Perundurai.
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 Perundurai averaged 75 — a 51-point (68%) gap, with Howrah the more polluted and Perundurai the cleaner of the two. On 57 days when both cities reported, Perundurai was cleaner on 56 of them; the average daily gap was 197 AQI points.
Seasonality & days
Howrah peaks in December, while Perundurai peaks in November. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Perundurai was 0% Severe and 80.7% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Perundurai 13 days.
Year-over-year progress
The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Perundurai hit AQI 153 at SIPCOT Industrial Park (TNPCB) on 2024-11-12.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Perundurai spans 1 stations with a 0-point spread (min 75, max 75).