Bihar Sharif vs Gummidipoondi
Side-by-side air quality comparison between Bihar Sharif and Gummidipoondi.
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 | Gummidipoondi |
|---|---|---|
| PM2.5(µg/m³) | 71.90 | 10.50 |
| PM10(µg/m³) | 79.40 | 12.00 |
| NO₂(µg/m³) | 27.20 | 11.90 |
| SO₂(µg/m³) | 14.60 | 6.80 |
| O₃(µg/m³) | 64.00 | 52.00 |
| CO(µg/m³) | 543.00 | 286.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bihar Sharif averaged an AQI of 115 while Gummidipoondi averaged 107 — a 8-point (7%) gap, with Bihar Sharif the more polluted and Gummidipoondi the cleaner of the two. On 660 days when both cities reported, Gummidipoondi was cleaner on 363 of them; the average daily gap was 70 AQI points.
Seasonality & days
Bihar Sharif peaks in December, while Gummidipoondi peaks in November. Bihar Sharif logged 1% Severe days and 39.1% Good-or-Satisfactory days; Gummidipoondi was 0% Severe and 59.1% Good-or-Satisfactory. Longest clean-air streaks: Bihar Sharif 32 days, Gummidipoondi 49 days.
Year-over-year progress
Bihar Sharif has improved by 138 AQI points (54.5%) from 2021 to 2024; Gummidipoondi has worsened by 8 AQI points (8.1%) over the same window. The worst recorded day for Bihar Sharif reached AQI 433 at D M Colony Bihar (BSPCB) on 2021-12-24; Gummidipoondi hit AQI 326 at Anthoni Pillai Nagar (TNPCB) on 2023-12-22.
Station-level disparity
Bihar Sharif spans 1 CPCB stations with a 0-point spread (min 146, max 146); Gummidipoondi spans 1 stations with a 0-point spread (min 99, max 99).
Verdict
🏆 Gummidipoondi has better air quality with an AQI of 18 compared to Bihar Sharif's 140. That's a significant difference of 122 points.