Nagapattinam vs Shillong
Side-by-side air quality comparison between Nagapattinam and Shillong.
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 | Nagapattinam | Shillong |
|---|---|---|
| PM2.5(µg/m³) | 12.50 | 17.90 |
| PM10(µg/m³) | 16.20 | 21.40 |
| NO₂(µg/m³) | 9.80 | 3.10 |
| SO₂(µg/m³) | 4.10 | 6.20 |
| O₃(µg/m³) | 38.00 | 118.00 |
| CO(µg/m³) | 211.00 | 304.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Nagapattinam averaged an AQI of 60 while Shillong averaged 75 — a 15-point (25%) gap, with Shillong the more polluted and Nagapattinam the cleaner of the two. On 8 days when both cities reported, Shillong was cleaner on 7 of them; the average daily gap was 27 AQI points.
Seasonality & days
Nagapattinam peaks in November, while Shillong peaks in February. Nagapattinam logged 0% Severe days and 91.5% Good-or-Satisfactory days; Shillong was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Nagapattinam 8 days, Shillong 113 days.
Year-over-year progress
The worst recorded day for Nagapattinam reached AQI 113 at Velippalayam (TNPCB) on 2024-12-16; Shillong hit AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19.
Station-level disparity
Nagapattinam spans 1 CPCB stations with a 0-point spread (min 60, max 60); Shillong spans 2 stations with a 2-point spread (min 42, max 44).
Verdict
🏆 Nagapattinam has better air quality with an AQI of 21 compared to Shillong's 30.