Fredrikstad Health Impact
Fredrikstad averaged 9.3 ug/m3 PM2.5, equal to 1.9x the WHO annual PM2.5 guideline and about 0.4 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Viken, Norway.
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Average EPA AQI
41
Rank 8 of 21 cities by average AQI
PM2.5
9.3
ug/m3 annualized city average
Seasonality
January
Cleanest: July
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Fredrikstad
92
46
47
32
36
28
21
29
36
38
45
42
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Fredrikstad, the current global analytics build covers 362 daily rows from 2024-01-03 to 2024-12-31. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.