Salem vs Surat
Side-by-side air quality comparison between Salem and Surat.
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 | Salem | Surat |
|---|---|---|
| PM2.5(µg/m³) | 12.70 | 23.90 |
| PM10(µg/m³) | 15.90 | 45.10 |
| NO₂(µg/m³) | 17.00 | 22.90 |
| SO₂(µg/m³) | 7.00 | 38.50 |
| O₃(µg/m³) | 30.00 | 33.00 |
| CO(µg/m³) | 237.00 | 249.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Salem averaged an AQI of 68 while Surat averaged 83 — a 15-point (22%) gap, with Surat the more polluted and Salem the cleaner of the two. On 304 days when both cities reported, Salem was cleaner on 208 of them; the average daily gap was 78 AQI points.
Seasonality & days
Salem peaks in April, while Surat peaks in November. Salem logged 0% Severe days and 87.1% Good-or-Satisfactory days; Surat was 0% Severe and 55.9% Good-or-Satisfactory. Longest clean-air streaks: Salem 17 days, Surat 55 days.
Year-over-year progress
Salem has improved by 5 AQI points (6.8%) from 2022 to 2024; Surat has improved by 139 AQI points (62.6%) over the same window. The worst recorded day for Salem reached AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15; Surat hit AQI 384 at Science Center (SMC) on 2023-08-19.
Station-level disparity
Salem spans 1 CPCB stations with a 0-point spread (min 73, max 73); Surat spans 1 stations with a 0-point spread (min 123, max 123).
Verdict
🏆 Salem has better air quality with an AQI of 21 compared to Surat's 45.