Kolkata vs Nayāgarh
Side-by-side air quality comparison between Kolkata and Nayāgarh.
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 | Nayāgarh |
|---|---|---|
| PM2.5(µg/m³) | 43.70 | 30.40 |
| PM10(µg/m³) | 51.30 | 41.60 |
| NO₂(µg/m³) | 2.40 | 1.10 |
| SO₂(µg/m³) | 11.70 | 7.40 |
| O₃(µg/m³) | 180.00 | 158.00 |
| CO(µg/m³) | 355.00 | 219.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Nayāgarh averaged 98 — a 3-point (3%) gap, with Kolkata the more polluted and Nayāgarh the cleaner of the two. On 322 days when both cities reported, Nayāgarh was cleaner on 244 of them; the average daily gap was 69 AQI points.
Seasonality & days
Kolkata peaks in January, while Nayāgarh peaks in April. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Nayāgarh was 0% Severe and 47.400000000000006% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Nayāgarh 52 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Nayāgarh has improved by 48 AQI points (32.9%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Nayāgarh hit AQI 336 at Dabuna (OSPCB) on 2023-03-13.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Nayāgarh spans 1 stations with a 0-point spread (min 116, max 116).
Verdict
🏆 Nayāgarh has better air quality with an AQI of 52 compared to Kolkata's 73.