Chittoor vs Salem
Side-by-side air quality comparison between Chittoor 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 | Chittoor | Salem |
|---|---|---|
| PM2.5(µg/m³) | 6.10 | 13.70 |
| PM10(µg/m³) | 7.70 | 16.40 |
| NO₂(µg/m³) | 7.30 | 15.30 |
| SO₂(µg/m³) | 3.10 | 9.30 |
| O₃(µg/m³) | 47.00 | 37.00 |
| CO(µg/m³) | 212.00 | 240.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chittoor averaged an AQI of 76 while Salem averaged 68 — a 8-point (12%) gap, with Chittoor the more polluted and Salem the cleaner of the two. On 282 days when both cities reported, Chittoor was cleaner on 148 of them; the average daily gap was 27 AQI points.
Seasonality & days
Chittoor peaks in October, while Salem peaks in April. Chittoor logged 0% Severe days and 84.9% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Chittoor 37 days, Salem 17 days.
Year-over-year progress
Chittoor has worsened by 5 AQI points (7%) from 2022 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Chittoor reached AQI 348 at Gangineni Cheruvu (APPCB) on 2023-11-13; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Chittoor spans 1 CPCB stations with a 0-point spread (min 72, max 72); Salem spans 1 stations with a 0-point spread (min 73, max 73).
Verdict
🏆 Chittoor has better air quality with an AQI of 10 compared to Salem's 23.