Bihar Sharif vs Perundurai
Side-by-side air quality comparison between Bihar Sharif and Perundurai.
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 | Bihar Sharif | Perundurai |
|---|---|---|
| PM2.5(µg/m³) | 74.50 | 6.80 |
| PM10(µg/m³) | 82.20 | 8.00 |
| NO₂(µg/m³) | 35.60 | 11.30 |
| SO₂(µg/m³) | 13.00 | 3.20 |
| O₃(µg/m³) | 31.00 | 32.00 |
| CO(µg/m³) | 620.00 | 159.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bihar Sharif averaged an AQI of 115 while Perundurai averaged 75 — a 40-point (53%) gap, with Bihar Sharif the more polluted and Perundurai the cleaner of the two. On 48 days when both cities reported, Perundurai was cleaner on 47 of them; the average daily gap was 128 AQI points.
Seasonality & days
Bihar Sharif peaks in December, while Perundurai peaks in November. Bihar Sharif logged 1% Severe days and 39.1% Good-or-Satisfactory days; Perundurai was 0% Severe and 80.7% Good-or-Satisfactory. Longest clean-air streaks: Bihar Sharif 32 days, Perundurai 13 days.
Year-over-year progress
The worst recorded day for Bihar Sharif reached AQI 433 at D M Colony Bihar (BSPCB) on 2021-12-24; Perundurai hit AQI 153 at SIPCOT Industrial Park (TNPCB) on 2024-11-12.
Station-level disparity
Bihar Sharif spans 1 CPCB stations with a 0-point spread (min 146, max 146); Perundurai spans 1 stations with a 0-point spread (min 75, max 75).
Verdict
🏆 Perundurai has better air quality with an AQI of 11 compared to Bihar Sharif's 149. That's a significant difference of 138 points.