Salem vs Thrissur
Side-by-side air quality comparison between Salem and Thrissur.
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 | Thrissur |
|---|---|---|
| PM2.5(µg/m³) | 12.90 | 8.20 |
| PM10(µg/m³) | 15.80 | 9.70 |
| NO₂(µg/m³) | 17.10 | 10.20 |
| SO₂(µg/m³) | 7.50 | 3.20 |
| O₃(µg/m³) | 30.00 | 26.00 |
| CO(µg/m³) | 243.00 | 146.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Salem averaged an AQI of 68 while Thrissur averaged 57 — a 11-point (19%) gap, with Salem the more polluted and Thrissur the cleaner of the two. On 315 days when both cities reported, Thrissur was cleaner on 170 of them; the average daily gap was 25 AQI points.
Seasonality & days
Salem peaks in April, while Thrissur peaks in February. Salem logged 0% Severe days and 87.1% Good-or-Satisfactory days; Thrissur was 0% Severe and 88.4% Good-or-Satisfactory. Longest clean-air streaks: Salem 17 days, Thrissur 52 days.
Year-over-year progress
Salem has improved by 5 AQI points (6.8%) from 2022 to 2024; Thrissur has improved by 21 AQI points (26.9%) over the same window. The worst recorded day for Salem reached AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15; Thrissur hit AQI 181 at Corporation Ground Thrissur (PCB) on 2023-01-09.
Station-level disparity
Salem spans 1 CPCB stations with a 0-point spread (min 73, max 73); Thrissur spans 1 stations with a 0-point spread (min 68, max 68).
Verdict
🏆 Thrissur has better air quality with an AQI of 14 compared to Salem's 22.