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Portela vs Santa Cruz AQI Comparison

Side-by-side OpenAQ-derived air quality comparison for Portela and Santa Cruz. Values use mapped daily PM2.5 and PM10 observations normalized to US EPA AQI.

Lower average AQI: Santa Cruz (32-pt gap)PM2.5: Portela 11.2 ug/m3 · Santa Cruz 3.4 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-01-012024-09-22 and 2024-01-012024-12-30.

Compare two cities

Portela vs Santa Cruz

Portela

Lisboa, Portugal

49
PM2.5
11.2 ug/m3
PM10
20.4 ug/m3
Worst month
January
Trend
n/a

EPA category: Good

Santa Cruz

Madeira, Portugal

17
PM2.5
3.4 ug/m3
PM10
13.0 ug/m3
Worst month
December
Trend
n/a

EPA category: Good

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

Yearly EPA AQI trend

0501002024PortelaSanta Cruz

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec
Portela
54
49
34
-
-
-
-
-
-
-
-
-
Santa Cruz
16
18
16
21
7
8
7
14
22
14
22
35

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.
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