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Air quality in San Mateo County

Air quality index (AQI⁺) and PM2.5 air pollution in San Mateo County • 15 Followers • 15:00, Jun 02 Local time

US AQI⁺

Good

Main pollutant:

PM2.5

5.5 µg/m³

15°

13 km/h

72 %

Hourly forecast

San Mateo County air quality index (AQI⁺) forecast

Now

15°

km/h

72%

16:00

90%

15°

km/h

74%

17:00

50%

14°

km/h

76%

18:00

13°

km/h

81%

19:00

90%

13°

km/h

78%

20:00

12°

km/h

80%

21:00

10°

km/h

92%

22:00

90%

10°

km/h

89%

23:00

90%

10°

km/h

97%

Wed

00:00

10°

km/h

92%

01:00

90%

9°

km/h

90%

02:00

90%

9°

km/h

88%

03:00

9°

km/h

94%

04:00

90%

9°

km/h

95%

05:00

90%

9°

km/h

99%

06:00

9°

km/h

92%

07:00

90%

10°

km/h

87%

08:00

90%

11°

km/h

79%

09:00

12°

km/h

68%

10:00

90%

14°

km/h

61%

11:00

15°

km/h

53%

12:00

16°

km/h

51%

13:00

17°

km/h

47%

14:00

17°

km/h

50%

15:00

17°

km/h

57%

16:00

16°

km/h

67%

17:00

16°

km/h

77%

18:00

15°

km/h

88%

19:00

13°

km/h

96%

20:00

90%

12°

km/h

97%

21:00

12°

km/h

97%

22:00

90%

11°

km/h

98%

23:00

90%

10°

km/h

98%

Thu

00:00

10°

km/h

98%

01:00

90%

9°

km/h

98%

02:00

90%

9°

km/h

98%

03:00

9°

km/h

98%

04:00

90%

9°

km/h

98%

05:00

90%

9°

km/h

98%

06:00

11°

km/h

75%

07:00

11°

km/h

85%

08:00

13°

km/h

85%

09:00

14°

km/h

87%

10:00

15°

km/h

81%

11:00

16°

km/h

74%

12:00

17°

km/h

69%

13:00

16°

km/h

71%

14:00

90%

15°

km/h

73%

15:00

14°

km/h

69%

16:00

90%

13°

km/h

74%

17:00

90%

13°

km/h

77%

18:00

15°

km/h

66%

19:00

14°

km/h

69%

20:00

12°

km/h

81%

21:00

10°

km/h

94%

22:00

10°

km/h

95%

23:00

10°

km/h

95%

Fri

00:00

10°

km/h

96%

01:00

10°

km/h

96%

02:00

10°

km/h

96%

03:00

9°

km/h

96%

04:00

9°

km/h

97%

05:00

9°

km/h

97%

06:00

9°

km/h

97%

07:00

10°

km/h

91%

08:00

13°

km/h

78%

09:00

15°

km/h

65%

10:00

18°

km/h

54%

11:00

20°

km/h

49%

12:00

20°

km/h

49%

13:00

20°

km/h

49%

14:00

20°

km/h

49%

Daily forecast

San Mateo County air quality index (AQI⁺) forecast

Today

17°

10°

km/h

82%

Wed

17°

9°

km/h

74%

Thu

17°

10°

km/h

78%

Air pollutants

What is the current air quality in San Mateo County?

PM2.5 concentration is currently 1.1 times the World Health Organization annual PM2.5 guideline value.

Real-time San Mateo County air pollution map

Health recommendations

Enjoy outdoor activities

Open your windows to bring clean, fresh air indoors

Get a monitor

Protect yourself from air pollution in San Mateo County

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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.

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Powerful, stylish air purifiers

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

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Pollen

What is the pollen count in San Mateo County today?

Index

Low

Tree

None

Grass

Low

25%

Weed

None

Source:

wetter.com

Pollen forecast in San Mateo County

Health recommendations

Enjoy outdoor activities

Open your windows to bring clean, fresh air indoors

Get a monitor

Real-time San Mateo County air pollution map

Pollen

What is the pollen count in San Mateo County today?

Index

Low

Tree

None

Grass

Low

25%

Weed

None

Source:

wetter.com

Pollen forecast in San Mateo County

Protect yourself from air pollution in San Mateo County

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

Most polluted locations near San Mateo County

Worldwide AQI⁺ ranking

Station ranking

Real-time AQI⁺ station ranking for stations in San Mateo County

#	Stations	AQI⁺ US
1	265 Old Spanish Trail	37
2	920 Bear Gulch Road	37
3	Experimental Facilities Dept Shops EFD	34
4	Alberta Glen	33
5	Alexander Avenue	32
6	Arlington Way	31
7	Durham Road	31
8	480 Tunitas Creek Road	29
9	Dirt Alpine	29
10	Alpine Road	24

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Glendora, California	72
2	Port Arthur, Texas	72
3	Mission, Texas	69
4	Altadena, California	67
5	Hacienda Heights, California	66
6	Pasadena, California	66
7	East Los Angeles, California	65
8	Jurupa Valley, California	65
9	La Cañada Flintridge, California	65
10	La Crescenta-Montrose, California	65

History

Historic air quality graph for San Mateo County

31 AQI⁺ US

Good

14:00–15:00 Jun 02 Local time

AQI⁺ US

History

Historic air quality graph for San Mateo County

31 AQI⁺ US

Good

14:00–15:00 Jun 02 Local time

AQI⁺ US

Most polluted locations near San Mateo County

Worldwide AQI⁺ ranking

Station ranking

Real-time AQI⁺ station ranking for stations in San Mateo County

#	Stations	AQI⁺ US
1	265 Old Spanish Trail	37
2	920 Bear Gulch Road	37
3	Experimental Facilities Dept Shops EFD	34
4	Alberta Glen	33
5	Alexander Avenue	32
6	Arlington Way	31
7	Durham Road	31
8	480 Tunitas Creek Road	29
9	Dirt Alpine	29
10	Alpine Road	24

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Glendora, California	72
2	Port Arthur, Texas	72
3	Mission, Texas	69
4	Altadena, California	67
5	Hacienda Heights, California	66
6	Pasadena, California	66
7	East Los Angeles, California	65
8	Jurupa Valley, California	65
9	La Cañada Flintridge, California	65
10	La Crescenta-Montrose, California	65