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Ayer, MA Air Quality

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Air quality in Ayer

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
41
Good
PM2.5
7.5 µg/m³
WHO guideline 15
PM10
7.6 µg/m³
WHO guideline 45
NO₂ · O₃
9 · 87
µg/m³

Hour by hour (12h)

US EPA AQI
2:00 AM 💨 PM2.5 7.5 µg/m³
41Good
3:00 AM 💨 PM2.5 7.4 µg/m³
36Good
4:00 AM 💨 PM2.5 7.4 µg/m³
31Good
5:00 AM 💨 PM2.5 7.5 µg/m³
31Good
6:00 AM 💨 PM2.5 7.5 µg/m³
31Good
7:00 AM 💨 PM2.5 7.7 µg/m³
32Good
8:00 AM 💨 PM2.5 8.8 µg/m³
37Good
9:00 AM 💨 PM2.5 8.7 µg/m³
36Good
10:00 AM 💨 PM2.5 7.1 µg/m³
37Good
11:00 AM 💨 PM2.5 5.3 µg/m³
42Good
12:00 PM 💨 PM2.5 5.1 µg/m³
43Good
1:00 PM 💨 PM2.5 6.7 µg/m³
42Good

Next few days

daily max · US EPA AQI
Mon 💨 Moderate · UV High
55
Tue 💨 Moderate · UV High
55
Wed 💨 Good · UV High
41
Thu 💨 Unhealthy for Sensitive Groups · UV High
106
Fri 💨 Good · UV High
45
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Updated: 2:55 AM