Chapra vs Karur
Side-by-side air quality comparison between Chapra and Karur.
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 | Chapra | Karur |
|---|---|---|
| PM2.5(µg/m³) | 99.00 | 3.80 |
| PM10(µg/m³) | 115.50 | 4.40 |
| NO₂(µg/m³) | 53.70 | 7.30 |
| SO₂(µg/m³) | 13.70 | 2.70 |
| O₃(µg/m³) | 10.00 | 37.00 |
| CO(µg/m³) | 858.00 | 117.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chapra averaged an AQI of 149 while Karur averaged 71 — a 78-point (110%) gap, with Chapra the more polluted and Karur the cleaner of the two. On 56 days when both cities reported, Karur was cleaner on 54 of them; the average daily gap was 77 AQI points.
Seasonality & days
Chapra peaks in January, while Karur peaks in December. Chapra logged 2.4% Severe days and 26.8% Good-or-Satisfactory days; Karur was 0% Severe and 80.3% Good-or-Satisfactory. Longest clean-air streaks: Chapra 14 days, Karur 34 days.
Year-over-year progress
The worst recorded day for Chapra reached AQI 452 at Darshan Nagar (BSPCB) on 2022-12-20; Karur hit AQI 149 at Kamadenu Nagar (TNPCB) on 2024-11-26.
Station-level disparity
Chapra spans 1 CPCB stations with a 0-point spread (min 195, max 195); Karur spans 1 stations with a 0-point spread (min 71, max 71).
Verdict
🏆 Karur has better air quality with an AQI of 6 compared to Chapra's 231. That's a significant difference of 225 points.