Karur vs Patna
Side-by-side air quality comparison between Karur and Patna.
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 | Karur | Patna |
|---|---|---|
| PM2.5(µg/m³) | 2.30 | 55.80 |
| PM10(µg/m³) | 2.90 | 82.70 |
| NO₂(µg/m³) | 1.20 | 0.80 |
| SO₂(µg/m³) | 1.30 | 8.90 |
| O₃(µg/m³) | 81.00 | 205.00 |
| CO(µg/m³) | 120.00 | 295.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Karur averaged an AQI of 71 while Patna averaged 172 — a 101-point (142%) gap, with Patna the more polluted and Karur the cleaner of the two. On 71 days when both cities reported, Karur was cleaner on 71 of them; the average daily gap was 235 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Karur logged 0% Severe days and 80.3% Good-or-Satisfactory days; Patna was 7.5% Severe and 19.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Karur 34 days, Patna 30 days.
Year-over-year progress
The worst recorded day for Karur reached AQI 149 at Kamadenu Nagar (TNPCB) on 2024-11-26; Patna hit AQI 491 at IGSC Planetarium Complex (BSPCB) on 2016-01-01.
Station-level disparity
Karur spans 1 CPCB stations with a 0-point spread (min 71, max 71); Patna spans 6 stations with a 39-point spread (min 154, max 193).
Verdict
🏆 Karur has better air quality with an AQI of 4 compared to Patna's 93. That's a significant difference of 89 points.