Bhagalpur vs Salem
Side-by-side air quality comparison between Bhagalpur 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 | Bhagalpur | Salem |
|---|---|---|
| PM2.5(µg/m³) | 56.30 | 8.00 |
| PM10(µg/m³) | 71.50 | 9.60 |
| NO₂(µg/m³) | 3.50 | 2.70 |
| SO₂(µg/m³) | 16.70 | 7.30 |
| O₃(µg/m³) | 189.00 | 111.00 |
| CO(µg/m³) | 317.00 | 174.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bhagalpur averaged an AQI of 164 while Salem averaged 68 — a 96-point (141%) gap, with Bhagalpur the more polluted and Salem the cleaner of the two. On 385 days when both cities reported, Salem was cleaner on 359 of them; the average daily gap was 140 AQI points.
Seasonality & days
Bhagalpur peaks in January, while Salem peaks in April. Bhagalpur logged 1.9% Severe days and 19.9% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Bhagalpur 20 days, Salem 17 days.
Year-over-year progress
Bhagalpur has improved by 123 AQI points (42.9%) from 2021 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Bhagalpur reached AQI 451 at Mayaganj (BSPCB) on 2022-12-30; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Bhagalpur spans 2 CPCB stations with a 26-point spread (min 170, max 196); Salem spans 1 stations with a 0-point spread (min 73, max 73).
Verdict
🏆 Salem has better air quality with an AQI of 13 compared to Bhagalpur's 94. That's a significant difference of 81 points.