Arrah vs Gummidipoondi
Side-by-side air quality comparison between Arrah and Gummidipoondi.
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 | Arrah | Gummidipoondi |
|---|---|---|
| PM2.5(µg/m³) | 102.90 | 10.50 |
| PM10(µg/m³) | 117.10 | 12.00 |
| NO₂(µg/m³) | 42.70 | 11.90 |
| SO₂(µg/m³) | 15.30 | 6.80 |
| O₃(µg/m³) | 46.00 | 52.00 |
| CO(µg/m³) | 841.00 | 286.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Arrah averaged an AQI of 123 while Gummidipoondi averaged 107 — a 16-point (15%) gap, with Arrah the more polluted and Gummidipoondi the cleaner of the two. On 646 days when both cities reported, Gummidipoondi was cleaner on 465 of them; the average daily gap was 80 AQI points.
Seasonality & days
Arrah peaks in January, while Gummidipoondi peaks in November. Arrah logged 0.2% Severe days and 32.3% Good-or-Satisfactory days; Gummidipoondi was 0% Severe and 59.1% Good-or-Satisfactory. Longest clean-air streaks: Arrah 11 days, Gummidipoondi 49 days.
Year-over-year progress
Arrah has improved by 175 AQI points (58.7%) from 2021 to 2024; Gummidipoondi has worsened by 8 AQI points (8.1%) over the same window. The worst recorded day for Arrah reached AQI 420 at New DM Office (BSPCB) on 2021-12-21; Gummidipoondi hit AQI 326 at Anthoni Pillai Nagar (TNPCB) on 2023-12-22.
Station-level disparity
Arrah spans 1 CPCB stations with a 0-point spread (min 162, max 162); Gummidipoondi spans 1 stations with a 0-point spread (min 99, max 99).
Verdict
🏆 Gummidipoondi has better air quality with an AQI of 18 compared to Arrah's 244. That's a significant difference of 226 points.