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Air quality · Puerto Rico

San Juan Air Quality (AQI) Now

12 Good
European Air Quality Index
PM2.5
3.0µg/m³WHO limit 15
PM10
4.3µg/m³WHO limit 45
NO₂
1.5µg/m³
O₃
36µg/m³
Desert dust
0µg/m³
UV index
0.0
US AQI
16

Updated: · Source: Copernicus CAMS · Open-Meteo

Air quality in San Juan is good right now: European Air Quality Index 12. Fine particulate matter (PM2.5) is 3.0 µg/m³, below the WHO guideline. Fine for all outdoor activities. Pollution is expected to peak around 21:00 over the next 48 hours (index 18, good).

San Juan 48-hour air quality forecast

10:00: 1410:0011:00: 1512:00: 1513:00: 1514:00: 1515:00: 1516:00: 1516:0017:00: 1518:00: 1419:00: 1520:00: 1721:00: 1822:00: 1822:0023:00: 1600:00: 1401:00: 1202:00: 1003:00: 1004:00: 904:0005:00: 906:00: 1007:00: 1008:00: 1109:00: 1210:00: 1310:0011:00: 1312:00: 1413:00: 1414:00: 1415:00: 1416:00: 1316:0017:00: 1318:00: 1219:00: 1120:00: 1021:00: 1022:00: 1222:0023:00: 1000:00: 901:00: 902:00: 903:00: 904:00: 1004:0005:00: 1106:00: 1107:00: 1208:00: 1309:00: 14

Air quality near San Juan

Cleanest to most polluted.

Frequently asked questions

Is San Juan polluted today?
Air quality in San Juan is good right now: European Air Quality Index 12. Fine for all outdoor activities.
Is it safe to exercise outdoors in San Juan today?
Yes, air quality is good right now; fine for outdoor exercise.
How is the air quality index calculated?
The European Air Quality Index is set by the worst of PM2.5, PM10, nitrogen dioxide, ozone and sulphur dioxide: 0–20 good, 20–40 fair, 40–60 moderate, 60–80 poor, 80–100 very poor, above 100 extremely poor.

Values are Copernicus Atmosphere Monitoring Service (CAMS) model forecasts and may differ from local monitoring stations.

San Juan air quality: details

Pollutants and recent days

Nitrogen dioxide (NO₂) is 1.5 µg/m³ and ozone (O₃) 36 µg/m³; WHO guideline values are 25 (24 h) and 100 µg/m³ (8 h).