Howrah vs Nārnaul
Side-by-side air quality comparison between Howrah and Nārnaul.
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 | Howrah | Nārnaul |
|---|---|---|
| PM2.5(µg/m³) | 68.70 | 45.80 |
| PM10(µg/m³) | 72.60 | 120.10 |
| NO₂(µg/m³) | 22.20 | 21.00 |
| SO₂(µg/m³) | 11.50 | 7.10 |
| O₃(µg/m³) | 55.00 | 63.00 |
| CO(µg/m³) | 360.00 | 386.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Nārnaul averaged 94 — a 32-point (34%) gap, with Howrah the more polluted and Nārnaul the cleaner of the two. On 1583 days when both cities reported, Nārnaul was cleaner on 932 of them; the average daily gap was 76 AQI points.
Seasonality & days
Howrah peaks in December, while Nārnaul peaks in November. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Nārnaul was 0.1% Severe and 40.8% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Nārnaul 63 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Nārnaul has improved by 37 AQI points (28.2%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Nārnaul hit AQI 435 at Shastri Nagar (HSPCB) on 2023-11-16.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Nārnaul spans 1 stations with a 0-point spread (min 130, max 130).
Verdict
🏆 Nārnaul has better air quality with an AQI of 114 compared to Howrah's 130.