Howrah vs Sagar
Side-by-side air quality comparison between Howrah and Sagar.
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 | Sagar |
|---|---|---|
| PM2.5(µg/m³) | 68.70 | 25.90 |
| PM10(µg/m³) | 72.60 | 49.60 |
| NO₂(µg/m³) | 22.20 | 14.50 |
| SO₂(µg/m³) | 11.50 | 3.20 |
| O₃(µg/m³) | 55.00 | 48.00 |
| CO(µg/m³) | 360.00 | 223.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Sagar averaged 96 — a 30-point (31%) gap, with Howrah the more polluted and Sagar the cleaner of the two. On 1313 days when both cities reported, Sagar was cleaner on 967 of them; the average daily gap was 87 AQI points.
Seasonality & days
Howrah peaks in December, while Sagar peaks in November. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Sagar was 0% Severe and 69.9% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Sagar 57 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Sagar has worsened by 24 AQI points (33.3%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Sagar hit AQI 347 at Civil Lines (MPPCB) on 2024-12-25.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Sagar spans 2 stations with a 45-point spread (min 73, max 118).
Verdict
🏆 Sagar has better air quality with an AQI of 50 compared to Howrah's 130. That's a significant difference of 80 points.