Purnia vs Thanjavur
Side-by-side air quality comparison between Purnia and Thanjavur.
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 | Purnia | Thanjavur |
|---|---|---|
| PM2.5(µg/m³) | 86.40 | 6.20 |
| PM10(µg/m³) | 99.00 | 7.70 |
| NO₂(µg/m³) | 1.80 | 1.20 |
| SO₂(µg/m³) | 22.40 | 2.10 |
| O₃(µg/m³) | 241.00 | 105.00 |
| CO(µg/m³) | 323.00 | 128.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Purnia averaged an AQI of 133 while Thanjavur averaged 42 — a 91-point (217%) gap, with Purnia the more polluted and Thanjavur the cleaner of the two. On 63 days when both cities reported, Thanjavur was cleaner on 62 of them; the average daily gap was 127 AQI points.
Seasonality & days
Purnia peaks in January, while Thanjavur peaks in November. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Thanjavur was 0% Severe and 98.60000000000001% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Thanjavur 21 days.
Year-over-year progress
The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Thanjavur hit AQI 140 at Parisutham Nagar (TNPCB) on 2024-11-01.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Thanjavur spans 1 stations with a 0-point spread (min 42, max 42).
Verdict
🏆 Thanjavur has better air quality with an AQI of 10 compared to Purnia's 188. That's a significant difference of 178 points.