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WeatherLive › Illinois › Decatur › Air Quality

Decatur, IL Air Quality

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Air quality in Decatur

The US Air Quality Index (EPA) grades air from 0 to 500 using fine particles (PM2.5/PM10), ozone and nitrogen dioxide. 0-50 is Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, and anything higher affects everyone.

US AQI · EPA
27
Good
PM2.5
1.1 µg/m³
WHO guideline 15
PM10
1.1 µg/m³
WHO guideline 45
NO₂ · O₃
3 · 58
µg/m³

Hour by hour (12h)

US EPA AQI
9:00 AM 💨 PM2.5 1.1 µg/m³
27Good
10:00 AM 💨 PM2.5 0.9 µg/m³
29Good
11:00 AM 💨 PM2.5 0.8 µg/m³
31Good
12:00 PM 💨 PM2.5 0.7 µg/m³
32Good
1:00 PM 💨 PM2.5 0.7 µg/m³
33Good
2:00 PM 💨 PM2.5 0.7 µg/m³
33Good
3:00 PM 💨 PM2.5 1.1 µg/m³
33Good
4:00 PM 💨 PM2.5 1 µg/m³
32Good
5:00 PM 💨 PM2.5 1.3 µg/m³
31Good
6:00 PM 💨 PM2.5 1.3 µg/m³
29Good
7:00 PM 💨 PM2.5 1.3 µg/m³
28Good
8:00 PM 💨 PM2.5 1.4 µg/m³
27Good

Next few days

daily max · US EPA AQI
Fri 💨 Good · UV Low
33
Sat 💨 Good · UV Low
33
Sun 💨 Moderate · UV Moderate
60
Mon 💨 Moderate · UV Moderate
62
Tue 💨 Moderate · UV Moderate
54

Weather map — Decatur

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Updated: 9:04 AM