Richmond Seasonal Pollution
Richmond usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in June. The page uses OpenAQ-derived daily history for 3 mapped monitoring locations in British Columbia, Canada.
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Average EPA AQI
19
Rank 153 of 158 cities by average AQI
PM2.5
3.6
ug/m3 annualized city average
Seasonality
January
Cleanest: June
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Richmond
24
17
19
16
14
13
20
24
20
19
22
23
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Richmond, the current global analytics build covers 367 daily rows from 2024-01-01 to 2025-01-01. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.