Firozabad vs Salem
Side-by-side air quality comparison between Firozabad 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 | Firozabad | Salem |
|---|---|---|
| PM2.5(µg/m³) | 61.70 | 12.50 |
| PM10(µg/m³) | 182.50 | 15.40 |
| NO₂(µg/m³) | 13.90 | 12.50 |
| SO₂(µg/m³) | 9.00 | 11.50 |
| O₃(µg/m³) | 108.00 | 49.00 |
| CO(µg/m³) | 456.00 | 232.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Firozabad averaged an AQI of 73 while Salem averaged 68 — a 5-point (7%) gap, with Firozabad the more polluted and Salem the cleaner of the two. On 199 days when both cities reported, Salem was cleaner on 137 of them; the average daily gap was 41 AQI points.
Seasonality & days
Firozabad peaks in January, while Salem peaks in April. Firozabad logged 0.6% Severe days and 56.6% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Firozabad 68 days, Salem 17 days.
Year-over-year progress
Firozabad has improved by 70 AQI points (49%) from 2021 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Firozabad reached AQI 489 at Nagla Bhau (UPPCB) on 2021-11-09; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Firozabad spans 2 CPCB stations with a 19-point spread (min 88, max 107); Salem spans 1 stations with a 0-point spread (min 73, max 73).
Verdict
🏆 Salem has better air quality with an AQI of 21 compared to Firozabad's 155. That's a significant difference of 134 points.