Gummidipoondi vs Ulhasnagar
Side-by-side air quality comparison between Gummidipoondi and Ulhasnagar.
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 | Ulhasnagar |
|---|---|---|
| PM2.5(µg/m³) | 10.60 | 22.10 |
| PM10(µg/m³) | 11.90 | 40.40 |
| NO₂(µg/m³) | 12.70 | 23.10 |
| SO₂(µg/m³) | 6.00 | 21.70 |
| O₃(µg/m³) | 51.00 | 19.00 |
| CO(µg/m³) | 298.00 | 208.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gummidipoondi averaged an AQI of 107 while Ulhasnagar averaged 117 — a 10-point (9%) gap, with Ulhasnagar the more polluted and Gummidipoondi the cleaner of the two. On 490 days when both cities reported, Ulhasnagar was cleaner on 251 of them; the average daily gap was 46 AQI points.
Seasonality & days
Gummidipoondi peaks in November, while Ulhasnagar peaks in January. Gummidipoondi logged 0% Severe days and 59.1% Good-or-Satisfactory days; Ulhasnagar was 0% Severe and 46.9% Good-or-Satisfactory. Longest clean-air streaks: Gummidipoondi 49 days, Ulhasnagar 74 days.
Year-over-year progress
Gummidipoondi has worsened by 8 AQI points (8.1%) from 2021 to 2024; Ulhasnagar has improved by 10 AQI points (7.9%) over the same window. The worst recorded day for Gummidipoondi reached AQI 326 at Anthoni Pillai Nagar (TNPCB) on 2023-12-22; Ulhasnagar hit AQI 319 at Sidhi Vinayak Nagar (MPCB) on 2023-11-13.
Station-level disparity
Gummidipoondi spans 1 CPCB stations with a 0-point spread (min 99, max 99); Ulhasnagar spans 1 stations with a 0-point spread (min 120, max 120).
Verdict
🏆 Gummidipoondi has better air quality with an AQI of 18 compared to Ulhasnagar's 40.