Downham Market vs East Ham AQI Comparison

Side-by-side OpenAQ-derived air quality comparison for Downham Market and East Ham. Values use mapped daily PM2.5 and PM10 observations normalized to US EPA AQI.

Lower average AQI: East Ham (1-pt gap)PM2.5: Downham Market 15.0 ug/m3 · East Ham 11.8 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-08-30–2024-12-31 and 2024-01-05–2024-04-02.

Compare two cities

City A

City B

Downham Market vs East Ham

Downham Market

Norfolk, United Kingdom

PM2.5: 15.0 ug/m3
PM10: 16.6 ug/m3
Worst month: November
Trend: n/a

EPA category: Moderate

East Ham

Newham, United Kingdom

PM2.5: 11.8 ug/m3
PM10: n/a ug/m3
Worst month: January
Trend: n/a

EPA category: Moderate

Lower average AQI in this selected period: East Ham. Values are historical OpenAQ-derived city summaries, not live readings.

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Downham Market

East Ham

What this comparison measures

Average EPA AQI — city-level daily AQI values averaged across the OpenAQ coverage window.
PM2.5 and PM10 — mapped monitor concentrations aggregated to daily city averages.
Seasonality — worst and cleanest months from the monthly city rollups.
Trend — difference between the earliest and latest yearly AQI average in this build.