Coimbatore vs Samastipur
Side-by-side air quality comparison between Coimbatore and Samastipur.
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 | Coimbatore | Samastipur |
|---|---|---|
| PM2.5(µg/m³) | 2.50 | 118.00 |
| PM10(µg/m³) | 3.00 | 134.60 |
| NO₂(µg/m³) | 4.60 | 61.60 |
| SO₂(µg/m³) | 2.00 | 18.30 |
| O₃(µg/m³) | 40.00 | 5.00 |
| CO(µg/m³) | 163.00 | 837.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Samastipur averaged 134 — a 68-point (103%) gap, with Samastipur the more polluted and Coimbatore the cleaner of the two. On 367 days when both cities reported, Coimbatore was cleaner on 343 of them; the average daily gap was 98 AQI points.
Seasonality & days
Coimbatore peaks in November, while Samastipur peaks in January. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Samastipur was 1.4% Severe and 23.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Samastipur 9 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Samastipur has improved by 84 AQI points (38.5%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Samastipur hit AQI 459 at DM Office Kasipur (BSPCB) on 2023-01-01.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Samastipur spans 1 stations with a 0-point spread (min 177, max 177).
Verdict
🏆 Coimbatore has better air quality with an AQI of 4 compared to Samastipur's 293. That's a significant difference of 289 points.