Hassan vs Salem
Side-by-side air quality comparison between Hassan 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 | Hassan | Salem |
|---|---|---|
| PM2.5(µg/m³) | 2.70 | 12.90 |
| PM10(µg/m³) | 4.00 | 15.80 |
| NO₂(µg/m³) | 4.10 | 17.10 |
| SO₂(µg/m³) | 0.60 | 7.50 |
| O₃(µg/m³) | 37.00 | 30.00 |
| CO(µg/m³) | 120.00 | 243.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Hassan averaged an AQI of 60 while Salem averaged 68 — a 8-point (13%) gap, with Salem the more polluted and Hassan the cleaner of the two. On 293 days when both cities reported, Hassan was cleaner on 189 of them; the average daily gap was 21 AQI points.
Seasonality & days
Hassan peaks in March, while Salem peaks in April. Hassan logged 0% Severe days and 92.5% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Hassan 51 days, Salem 17 days.
Year-over-year progress
Hassan has improved by 4 AQI points (6.2%) from 2021 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Hassan reached AQI 212 at BKatihalli (KSPCB) on 2024-05-11; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Hassan spans 1 CPCB stations with a 0-point spread (min 63, max 63); Salem spans 1 stations with a 0-point spread (min 73, max 73).
Verdict
🏆 Hassan has better air quality with an AQI of 5 compared to Salem's 22.