Kolkata vs Thanjavur
Side-by-side air quality comparison between Kolkata 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 | Kolkata | Thanjavur |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 12.00 |
| PM10(µg/m³) | 69.40 | 13.70 |
| NO₂(µg/m³) | 18.10 | 9.70 |
| SO₂(µg/m³) | 13.10 | 3.90 |
| O₃(µg/m³) | 86.00 | 38.00 |
| CO(µg/m³) | 428.00 | 163.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Thanjavur averaged 42 — a 59-point (140%) gap, with Kolkata the more polluted and Thanjavur the cleaner of the two. On 70 days when both cities reported, Thanjavur was cleaner on 69 of them; the average daily gap was 133 AQI points.
Seasonality & days
Kolkata peaks in January, while Thanjavur peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Thanjavur was 0% Severe and 98.60000000000001% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Thanjavur 21 days.
Year-over-year progress
The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Thanjavur hit AQI 140 at Parisutham Nagar (TNPCB) on 2024-11-01.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Thanjavur spans 1 stations with a 0-point spread (min 42, max 42).
Verdict
🏆 Thanjavur has better air quality with an AQI of 20 compared to Kolkata's 117. That's a significant difference of 97 points.