Delhi vs Howrah
Side-by-side air quality comparison between Delhi 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 | Delhi | Howrah |
|---|---|---|
| PM2.5(µg/m³) | 80.80 | 64.70 |
| PM10(µg/m³) | 143.90 | 69.40 |
| NO₂(µg/m³) | 41.80 | 18.10 |
| SO₂(µg/m³) | 33.00 | 13.10 |
| O₃(µg/m³) | 63.00 | 86.00 |
| CO(µg/m³) | 568.00 | 421.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Delhi averaged an AQI of 210 while Howrah averaged 126 — a 84-point (67%) gap, with Delhi the more polluted and Howrah the cleaner of the two. On 2372 days when both cities reported, Howrah was cleaner on 2222 of them; the average daily gap was 151 AQI points.
Seasonality & days
Delhi peaks in November, while Howrah peaks in December. Delhi logged 18.7% Severe days and 1.7% Good-or-Satisfactory days; Howrah was 0.7% Severe and 48.7% Good-or-Satisfactory. Longest clean-air streaks: Delhi 3 days, Howrah 120 days.
Year-over-year progress
Delhi has improved by 42 AQI points (16.7%) from 2016 to 2024; Howrah has improved by 32 AQI points (20.3%) over the same window. The worst recorded day for Delhi reached AQI 500 at Ashok Vihar (DPCC) on 2024-11-18; Howrah hit AQI 500 at Ghusuri (WBPCB) on 2017-04-15.
Station-level disparity
Delhi spans 39 CPCB stations with a 84-point spread (min 178, max 262); 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 Delhi's 170. That's a significant difference of 53 points.