Heroica Matamoros Seasonal Pollution
Heroica Matamoros usually records its highest OpenAQ-derived EPA AQI in May and its cleanest month in September. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Tamaulipas, Mexico.
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Average EPA AQI
47
Rank 73 of 86 cities by average AQI
PM2.5
11.0
ug/m3 annualized city average
Seasonality
May
Cleanest: September
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Heroica Matamoros
-
38
47
53
88
49
51
35
33
35
38
40
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Heroica Matamoros, the current global analytics build covers 321 daily rows from 2024-02-02 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.