North Walsham Health Impact
North Walsham averaged 6.6 ug/m3 PM2.5, equal to 1.3x the WHO annual PM2.5 guideline and about 0.3 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Norfolk, United Kingdom.
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Average EPA AQI
Rank 103 of 171 cities by average AQI
PM2.5
6.6
ug/m3 annualized city average
Seasonality
March
Cleanest: July
Health indicator
0.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For North Walsham, the current global analytics build covers 279 daily rows from 2024-01-01 to 2024-10-19. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.