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Air quality in San Mateo

Air quality index (AQI⁺) and PM2.5 air pollution in San Mateo • 00:00, May 15 Local time

165

US AQI⁺

Unhealthy

Main pollutant:

PM2.5

75 µg/m³

26°

7 km/h

84 %

Hourly forecast

San Mateo air quality index (AQI⁺) forecast

Now

165

26°

km/h

84%

03:00

140

25°

km/h

82%

04:00

131

25°

km/h

80%

05:00

123

25°

km/h

78%

06:00

114

26°

km/h

77%

07:00

104

27°

km/h

72%

08:00

29°

km/h

66%

09:00

31°

km/h

60%

10:00

32°

km/h

52%

11:00

33°

km/h

47%

12:00

33°

km/h

44%

13:00

34°

km/h

43%

14:00

34°

km/h

43%

15:00

34°

km/h

43%

16:00

33°

km/h

45%

17:00

32°

km/h

51%

18:00

30°

km/h

55%

19:00

28°

km/h

60%

20:00

90%

27°

km/h

70%

21:00

90%

26°

km/h

76%

22:00

26°

km/h

77%

23:00

26°

km/h

76%

Sat

00:00

26°

km/h

75%

01:00

26°

km/h

76%

02:00

26°

km/h

77%

03:00

26°

km/h

77%

04:00

26°

km/h

77%

05:00

25°

km/h

78%

06:00

26°

km/h

77%

07:00

27°

km/h

72%

08:00

29°

km/h

65%

09:00

31°

km/h

57%

10:00

32°

km/h

50%

11:00

33°

km/h

45%

12:00

34°

km/h

41%

13:00

35°

km/h

38%

14:00

35°

km/h

36%

15:00

34°

km/h

40%

16:00

33°

km/h

45%

17:00

80%

32°

km/h

49%

18:00

30°

km/h

51%

19:00

28°

km/h

54%

20:00

27°

km/h

60%

21:00

80%

26°

km/h

75%

22:00

26°

km/h

75%

23:00

26°

km/h

73%

Sun

00:00

26°

km/h

74%

01:00

26°

km/h

74%

02:00

26°

km/h

75%

03:00

25°

km/h

75%

04:00

25°

km/h

75%

05:00

25°

km/h

75%

06:00

26°

km/h

75%

07:00

27°

km/h

70%

08:00

29°

km/h

62%

09:00

31°

km/h

55%

10:00

32°

km/h

49%

11:00

34°

km/h

44%

12:00

35°

km/h

40%

13:00

35°

km/h

40%

14:00

35°

km/h

40%

15:00

34°

km/h

43%

Daily forecast

San Mateo air quality index (AQI⁺) forecast

Today

136

36°

27°

km/h

57%

Sat

34°

26°

km/h

58%

Sun

35°

26°

km/h

55%

Air pollutants

What is the current air quality in San Mateo?

PM2.5 concentration is currently 15 times the World Health Organization annual PM2.5 guideline value.

Real-time San Mateo air pollution map

Health recommendations

Avoid outdoor exercise

Close your windows to avoid dirty outdoor air

Get a monitor

Wear a mask outdoors

Get a mask

Run an air purifier

Get an air purifier

Protect yourself from air pollution in San Mateo

SHOP IQAIR PRODUCTS

Monitor the air you breathe

Get accurate AirVisual air quality readings and real-time insights for cleaner air. Monitors that reveal pollution sources, highlight when air purifier use is needed.

AirVisual Series

Medical grade air purifiers

Trusted worldwide, the HealthPro Series uses HyperHEPA technology. Filters ultrafine particles other air purifiers miss, delivering medical-grade protection.

HealthPro Series

Powerful, stylish air purifiers

Compact and powerful, the Atem Series combines Swiss engineering with high-performance air purification, filtering ultrafine particles with HyperHEPA technology.

Atem Series

Health recommendations

Avoid outdoor exercise

Close your windows to avoid dirty outdoor air

Get a monitor

Wear a mask outdoors

Get a mask

Run an air purifier

Get an air purifier

Real-time San Mateo air pollution map

Protect yourself from air pollution in San Mateo

SHOP IQAIR PRODUCTS

Monitor the air you breathe

Get accurate AirVisual air quality readings and real-time insights for cleaner air. Monitors that reveal pollution sources, highlight when air purifier use is needed.

AirVisual Series

Medical grade air purifiers

Trusted worldwide, the HealthPro Series uses HyperHEPA technology. Filters ultrafine particles other air purifiers miss, delivering medical-grade protection.

HealthPro Series

Powerful, stylish air purifiers

Compact and powerful, the Atem Series combines Swiss engineering with high-performance air purification, filtering ultrafine particles with HyperHEPA technology.

Atem Series