Nārnaul vs Salem
Side-by-side air quality comparison between Nārnaul and Salem.
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 | Nārnaul | Salem |
|---|---|---|
| PM2.5(µg/m³) | 45.40 | 13.70 |
| PM10(µg/m³) | 126.20 | 16.40 |
| NO₂(µg/m³) | 12.40 | 15.30 |
| SO₂(µg/m³) | 7.70 | 9.30 |
| O₃(µg/m³) | 86.00 | 37.00 |
| CO(µg/m³) | 365.00 | 240.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Nārnaul averaged an AQI of 94 while Salem averaged 68 — a 26-point (38%) gap, with Nārnaul the more polluted and Salem the cleaner of the two. On 338 days when both cities reported, Salem was cleaner on 268 of them; the average daily gap was 66 AQI points.
Seasonality & days
Nārnaul peaks in November, while Salem peaks in April. Nārnaul logged 0.1% Severe days and 40.8% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Nārnaul 63 days, Salem 17 days.
Year-over-year progress
Nārnaul has improved by 37 AQI points (28.2%) from 2019 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Nārnaul reached AQI 435 at Shastri Nagar (HSPCB) on 2023-11-16; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Nārnaul spans 1 CPCB stations with a 0-point spread (min 130, max 130); Salem spans 1 stations with a 0-point spread (min 73, max 73).
Verdict
🏆 Salem has better air quality with an AQI of 23 compared to Nārnaul's 118. That's a significant difference of 95 points.