Gummidipoondi vs Samastipur
Side-by-side air quality comparison between Gummidipoondi and Samastipur.
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 | Samastipur |
|---|---|---|
| PM2.5(µg/m³) | 10.60 | 124.30 |
| PM10(µg/m³) | 11.90 | 140.20 |
| NO₂(µg/m³) | 12.70 | 60.30 |
| SO₂(µg/m³) | 6.00 | 19.10 |
| O₃(µg/m³) | 51.00 | 14.00 |
| CO(µg/m³) | 298.00 | 804.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gummidipoondi averaged an AQI of 107 while Samastipur averaged 134 — a 27-point (25%) gap, with Samastipur the more polluted and Gummidipoondi the cleaner of the two. On 609 days when both cities reported, Gummidipoondi was cleaner on 447 of them; the average daily gap was 84 AQI points.
Seasonality & days
Gummidipoondi peaks in November, while Samastipur peaks in January. Gummidipoondi logged 0% Severe days and 59.1% Good-or-Satisfactory days; Samastipur was 1.4% Severe and 23.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Gummidipoondi 49 days, Samastipur 9 days.
Year-over-year progress
Gummidipoondi has worsened by 8 AQI points (8.1%) from 2021 to 2024; Samastipur has improved by 84 AQI points (38.5%) over the same window. The worst recorded day for Gummidipoondi reached AQI 326 at Anthoni Pillai Nagar (TNPCB) on 2023-12-22; Samastipur hit AQI 459 at DM Office Kasipur (BSPCB) on 2023-01-01.
Station-level disparity
Gummidipoondi spans 1 CPCB stations with a 0-point spread (min 99, max 99); Samastipur spans 1 stations with a 0-point spread (min 177, max 177).
Verdict
🏆 Gummidipoondi has better air quality with an AQI of 18 compared to Samastipur's 304. That's a significant difference of 286 points.