Hohhot — Air quality
Air quality
64.0
Bad
Dust (PM10)
135.5
Extreme
Hourly today
83.0
00:00
84.0
01:00
85.0
02:00
87.0
03:00
89.0
04:00
91.0
05:00
93.0
06:00
95.0
07:00
94.0
08:00
84.0
09:00
89.0
10:00
84.0
11:00
75.0
12:00
64.0
13:00
55.0
14:00
48.0
15:00
45.0
16:00
47.0
17:00
57.0
18:00
64.0
19:00
76.0
20:00
79.0
21:00
76.0
22:00
71.0
23:00
Coming days
Today
95.0
Very bad
Tomorrow
74.0
Bad
Sunday
141.0
Very bad
Monday
119.0
Very bad
Tuesday
95.0
Very bad
Pollutants
PM2.5
Fine particulate matter (PM2.5)
The smallest particles can reach the lungs and bloodstream.
47.0 µg/m³
Moderate
· AQI 58.0
PM10
Particulate matter (PM10)
Larger dust particles; may irritate airways and eyes.
135.5 µg/m³
Bad
· AQI 64.0
NO₂
Nitrogen dioxide
Mostly from traffic; higher levels make breathing harder.
7.9 µg/m³
Good
· AQI 16.0
O₃
Ground-level ozone
Forms in sunlight; may irritate throat and lungs.
72.0 µg/m³
Fair
· AQI 26.0
SO₂
Sulfur dioxide
Industrial / heating source; can quickly bother people with asthma.
9.7 µg/m³
Good
CO
Carbon monoxide
Colorless, odorless gas; high levels cause headache and dizziness.
680.0 µg/m³
Good
AQI scale
≤20
Good
Feel free to air rooms; outdoor plans are fine.
≤40
Fair
Sensitive people should watch for symptoms.
≤60
Moderate
After long spells outdoors, take it easier.
≤80
Bad
Avoid prolonged outdoor exercise.
80+
Very bad
Stay indoors if you can.
Frequently asked questions
What does the air quality index (AQI) mean?
The European AQI rates air cleanliness on a 0–100+ scale from the main pollutants (PM2.5, PM10, NO₂, O₃, etc.). Lower is better.
What is the difference between PM2.5 and PM10?
PM2.5 is fine dust under 2.5 µm; PM10 is under 10 µm. Finer particles go deeper into the lungs.
When should I be careful?
At moderate or worse AQI, shorten outdoor exercise, keep asthma meds handy, and air rooms less during busy traffic hours.