Nagapattinam vs Ulhasnagar
Side-by-side air quality comparison between Nagapattinam and Ulhasnagar.
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 | Ulhasnagar |
|---|---|---|
| PM2.5(µg/m³) | 11.20 | 19.80 |
| PM10(µg/m³) | 14.80 | 44.40 |
| NO₂(µg/m³) | 5.00 | 9.70 |
| SO₂(µg/m³) | 4.50 | 22.70 |
| O₃(µg/m³) | 66.00 | 58.00 |
| CO(µg/m³) | 208.00 | 162.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Nagapattinam averaged an AQI of 60 while Ulhasnagar averaged 117 — a 57-point (95%) gap, with Ulhasnagar the more polluted and Nagapattinam the cleaner of the two. On 45 days when both cities reported, Nagapattinam was cleaner on 45 of them; the average daily gap was 77 AQI points.
Seasonality & days
Nagapattinam peaks in November, while Ulhasnagar peaks in January. Nagapattinam logged 0% Severe days and 91.5% Good-or-Satisfactory days; Ulhasnagar was 0% Severe and 46.9% Good-or-Satisfactory. Longest clean-air streaks: Nagapattinam 8 days, Ulhasnagar 74 days.
Year-over-year progress
The worst recorded day for Nagapattinam reached AQI 113 at Velippalayam (TNPCB) on 2024-12-16; Ulhasnagar hit AQI 319 at Sidhi Vinayak Nagar (MPCB) on 2023-11-13.
Station-level disparity
Nagapattinam spans 1 CPCB stations with a 0-point spread (min 60, max 60); Ulhasnagar spans 1 stations with a 0-point spread (min 120, max 120).
Verdict
🏆 Nagapattinam has better air quality with an AQI of 19 compared to Ulhasnagar's 44.