Alwar vs Howrah
Side-by-side air quality comparison between Alwar and Howrah.
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 | Alwar | Howrah |
|---|---|---|
| PM2.5(µg/m³) | 58.70 | 64.70 |
| PM10(µg/m³) | 158.30 | 69.40 |
| NO₂(µg/m³) | 14.30 | 18.10 |
| SO₂(µg/m³) | 8.50 | 13.10 |
| O₃(µg/m³) | 76.00 | 86.00 |
| CO(µg/m³) | 357.00 | 421.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Alwar averaged an AQI of 88 while Howrah averaged 126 — a 38-point (43%) gap, with Howrah the more polluted and Alwar the cleaner of the two. On 2045 days when both cities reported, Alwar was cleaner on 1297 of them; the average daily gap was 88 AQI points.
Seasonality & days
Alwar peaks in November, while Howrah peaks in December. Alwar logged 0% Severe days and 70.2% Good-or-Satisfactory days; Howrah was 0.7% Severe and 48.7% Good-or-Satisfactory. Longest clean-air streaks: Alwar 97 days, Howrah 120 days.
Year-over-year progress
Alwar has improved by 125 AQI points (58.7%) from 2017 to 2024; Howrah has improved by 32 AQI points (20.3%) over the same window. The worst recorded day for Alwar reached AQI 356 at Moti Doongri (RSPCB) on 2017-11-11; Howrah hit AQI 500 at Ghusuri (WBPCB) on 2017-04-15.
Station-level disparity
Alwar spans 1 CPCB stations with a 0-point spread (min 95, max 95); Howrah spans 5 stations with a 116-point spread (min 111, max 227).
Verdict
🏆 Howrah has better air quality with an AQI of 117 compared to Alwar's 139.