Howrah vs Ulhasnagar
Side-by-side air quality comparison between Howrah 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 | Howrah | Ulhasnagar |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 23.70 |
| PM10(µg/m³) | 69.40 | 40.90 |
| NO₂(µg/m³) | 18.10 | 20.60 |
| SO₂(µg/m³) | 13.10 | 23.00 |
| O₃(µg/m³) | 86.00 | 23.00 |
| CO(µg/m³) | 421.00 | 215.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Ulhasnagar averaged 117 — a 9-point (8%) gap, with Howrah the more polluted and Ulhasnagar the cleaner of the two. On 353 days when both cities reported, Ulhasnagar was cleaner on 213 of them; the average daily gap was 58 AQI points.
Seasonality & days
Howrah peaks in December, while Ulhasnagar peaks in January. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Ulhasnagar was 0% Severe and 46.9% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Ulhasnagar 74 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Ulhasnagar has improved by 10 AQI points (7.9%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Ulhasnagar hit AQI 319 at Sidhi Vinayak Nagar (MPCB) on 2023-11-13.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Ulhasnagar spans 1 stations with a 0-point spread (min 120, max 120).
Verdict
🏆 Ulhasnagar has better air quality with an AQI of 41 compared to Howrah's 117. That's a significant difference of 76 points.