Salem vs Ulhasnagar
Side-by-side air quality comparison between Salem 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 | Salem | Ulhasnagar |
|---|---|---|
| PM2.5(µg/m³) | 13.70 | 23.70 |
| PM10(µg/m³) | 16.40 | 40.90 |
| NO₂(µg/m³) | 15.30 | 20.60 |
| SO₂(µg/m³) | 9.30 | 23.00 |
| O₃(µg/m³) | 37.00 | 23.00 |
| CO(µg/m³) | 240.00 | 215.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Salem averaged an AQI of 68 while Ulhasnagar averaged 117 — a 49-point (72%) gap, with Ulhasnagar the more polluted and Salem the cleaner of the two. On 235 days when both cities reported, Salem was cleaner on 205 of them; the average daily gap was 64 AQI points.
Seasonality & days
Salem peaks in April, while Ulhasnagar peaks in January. Salem logged 0% Severe days and 87.1% Good-or-Satisfactory days; Ulhasnagar was 0% Severe and 46.9% Good-or-Satisfactory. Longest clean-air streaks: Salem 17 days, Ulhasnagar 74 days.
Year-over-year progress
Salem has improved by 5 AQI points (6.8%) from 2022 to 2024; Ulhasnagar has improved by 10 AQI points (7.9%) over the same window. The worst recorded day for Salem reached AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15; Ulhasnagar hit AQI 319 at Sidhi Vinayak Nagar (MPCB) on 2023-11-13.
Station-level disparity
Salem spans 1 CPCB stations with a 0-point spread (min 73, max 73); Ulhasnagar spans 1 stations with a 0-point spread (min 120, max 120).
Verdict
🏆 Salem has better air quality with an AQI of 23 compared to Ulhasnagar's 41.