Gummidipoondi vs Salem
Side-by-side air quality comparison between Gummidipoondi and Salem.
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 | Salem |
|---|---|---|
| PM2.5(µg/m³) | 10.60 | 12.70 |
| PM10(µg/m³) | 11.90 | 15.90 |
| NO₂(µg/m³) | 12.70 | 17.00 |
| SO₂(µg/m³) | 6.00 | 7.00 |
| O₃(µg/m³) | 51.00 | 30.00 |
| CO(µg/m³) | 298.00 | 237.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gummidipoondi averaged an AQI of 107 while Salem averaged 68 — a 39-point (57%) gap, with Gummidipoondi the more polluted and Salem the cleaner of the two. On 318 days when both cities reported, Salem was cleaner on 268 of them; the average daily gap was 57 AQI points.
Seasonality & days
Gummidipoondi peaks in November, while Salem peaks in April. Gummidipoondi logged 0% Severe days and 59.1% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Gummidipoondi 49 days, Salem 17 days.
Year-over-year progress
Gummidipoondi has worsened by 8 AQI points (8.1%) from 2021 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Gummidipoondi reached AQI 326 at Anthoni Pillai Nagar (TNPCB) on 2023-12-22; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Gummidipoondi spans 1 CPCB stations with a 0-point spread (min 99, max 99); Salem spans 1 stations with a 0-point spread (min 73, max 73).
Verdict
🏆 Gummidipoondi has better air quality with an AQI of 18 compared to Salem's 21.