Chapra vs Nagapattinam
Side-by-side air quality comparison between Chapra and Nagapattinam.
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 | Chapra | Nagapattinam |
|---|---|---|
| PM2.5(µg/m³) | 102.90 | 12.50 |
| PM10(µg/m³) | 117.10 | 16.20 |
| NO₂(µg/m³) | 42.70 | 9.80 |
| SO₂(µg/m³) | 15.30 | 4.10 |
| O₃(µg/m³) | 46.00 | 38.00 |
| CO(µg/m³) | 805.00 | 211.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chapra averaged an AQI of 149 while Nagapattinam averaged 60 — a 89-point (148%) gap, with Chapra the more polluted and Nagapattinam the cleaner of the two. On 38 days when both cities reported, Nagapattinam was cleaner on 37 of them; the average daily gap was 83 AQI points.
Seasonality & days
Chapra peaks in January, while Nagapattinam peaks in November. Chapra logged 2.4% Severe days and 26.8% Good-or-Satisfactory days; Nagapattinam was 0% Severe and 91.5% Good-or-Satisfactory. Longest clean-air streaks: Chapra 14 days, Nagapattinam 8 days.
Year-over-year progress
The worst recorded day for Chapra reached AQI 452 at Darshan Nagar (BSPCB) on 2022-12-20; Nagapattinam hit AQI 113 at Velippalayam (TNPCB) on 2024-12-16.
Station-level disparity
Chapra spans 1 CPCB stations with a 0-point spread (min 195, max 195); Nagapattinam spans 1 stations with a 0-point spread (min 60, max 60).
Verdict
🏆 Nagapattinam has better air quality with an AQI of 21 compared to Chapra's 244. That's a significant difference of 223 points.