Nagapattinam vs Siwan
Side-by-side air quality comparison between Nagapattinam and Siwan.
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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Nagapattinam averaged an AQI of 60 while Siwan averaged 148 — a 88-point (147%) gap, with Siwan the more polluted and Nagapattinam the cleaner of the two. On 42 days when both cities reported, Nagapattinam was cleaner on 41 of them; the average daily gap was 85 AQI points.
Seasonality & days
Nagapattinam peaks in November, while Siwan peaks in January. Nagapattinam logged 0% Severe days and 91.5% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Nagapattinam 8 days, Siwan 13 days.
Year-over-year progress
The worst recorded day for Nagapattinam reached AQI 113 at Velippalayam (TNPCB) on 2024-12-16; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Nagapattinam spans 1 CPCB stations with a 0-point spread (min 60, max 60); Siwan spans 1 stations with a 0-point spread (min 197, max 197).