Gummidipoondi vs Howrah
Side-by-side air quality comparison between Gummidipoondi 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
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Gummidipoondi | Howrah |
|---|---|---|
| PM2.5(µg/m³) | 9.40 | 52.50 |
| PM10(µg/m³) | 11.90 | 58.80 |
| NO₂(µg/m³) | 9.50 | 11.70 |
| SO₂(µg/m³) | 8.60 | 14.30 |
| O₃(µg/m³) | 63.00 | 124.00 |
| CO(µg/m³) | 230.00 | 453.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gummidipoondi averaged an AQI of 107 while Howrah averaged 126 — a 19-point (18%) gap, with Howrah the more polluted and Gummidipoondi the cleaner of the two. On 744 days when both cities reported, Gummidipoondi was cleaner on 519 of them; the average daily gap was 79 AQI points.
Seasonality & days
Gummidipoondi peaks in November, while Howrah peaks in December. Gummidipoondi logged 0% Severe days and 59.1% Good-or-Satisfactory days; Howrah was 0.7% Severe and 48.7% Good-or-Satisfactory. Longest clean-air streaks: Gummidipoondi 49 days, Howrah 120 days.
Year-over-year progress
Gummidipoondi has worsened by 8 AQI points (8.1%) from 2021 to 2024; Howrah has improved by 32 AQI points (20.3%) over the same window. The worst recorded day for Gummidipoondi reached AQI 326 at Anthoni Pillai Nagar (TNPCB) on 2023-12-22; Howrah hit AQI 500 at Ghusuri (WBPCB) on 2017-04-15.
Station-level disparity
Gummidipoondi spans 1 CPCB stations with a 0-point spread (min 99, max 99); Howrah spans 5 stations with a 116-point spread (min 111, max 227).
Verdict
🏆 Gummidipoondi has better air quality with an AQI of 16 compared to Howrah's 88. That's a significant difference of 72 points.