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Air quality in San Mateo County

Air quality index (AQI⁺) and PM2.5 air pollution in San Mateo County • 24 Followers • 18:00, Oct 31 Local time

US AQI⁺

Good

Main pollutant:

PM2.5

2 µg/m³

12°

8 km/h

92 %

Hourly forecast

San Mateo County air quality index (AQI⁺) forecast

Now

12°

km/h

92%

19:00

80%

11°

km/h

98%

20:00

80%

11°

km/h

97%

21:00

11°

km/h

98%

22:00

11°

km/h

97%

23:00

12°

km/h

99%

Sun

00:00

80%

12°

km/h

99%

01:00

90%

12°

km/h

99%

01:00

80%

12°

km/h

99%

02:00

11°

km/h

99%

03:00

80%

11°

km/h

98%

04:00

80%

12°

km/h

99%

05:00

12°

km/h

99%

06:00

80%

11°

km/h

99%

07:00

80%

12°

km/h

99%

08:00

12°

km/h

98%

09:00

12°

km/h

93%

10:00

12°

km/h

91%

11:00

14°

km/h

74%

12:00

15°

km/h

70%

13:00

16°

km/h

63%

14:00

16°

km/h

61%

15:00

15°

km/h

72%

16:00

13°

km/h

85%

17:00

12°

km/h

92%

18:00

12°

km/h

97%

19:00

12°

km/h

91%

20:00

12°

km/h

83%

21:00

12°

km/h

74%

22:00

11°

km/h

91%

23:00

70%

11°

km/h

99%

Mon

00:00

11°

km/h

85%

01:00

12°

km/h

74%

02:00

11°

km/h

88%

03:00

12°

km/h

59%

04:00

12°

km/h

50%

05:00

13°

km/h

54%

06:00

12°

km/h

61%

07:00

12°

km/h

56%

08:00

13°

km/h

59%

09:00

14°

km/h

64%

10:00

14°

km/h

65%

11:00

15°

km/h

61%

12:00

17°

km/h

57%

13:00

16°

km/h

72%

14:00

15°

km/h

77%

15:00

15°

km/h

78%

16:00

14°

km/h

80%

17:00

13°

km/h

82%

18:00

13°

km/h

85%

19:00

12°

km/h

88%

20:00

12°

km/h

89%

21:00

12°

km/h

91%

22:00

12°

km/h

91%

23:00

12°

km/h

84%

Tue

00:00

12°

km/h

79%

01:00

12°

km/h

86%

02:00

12°

km/h

93%

03:00

12°

km/h

93%

04:00

13°

km/h

84%

05:00

13°

km/h

77%

06:00

11°

km/h

90%

07:00

11°

km/h

93%

08:00

13°

km/h

82%

09:00

14°

km/h

78%

10:00

13°

km/h

85%

11:00

70%

12°

km/h

90%

12:00

12°

km/h

91%

13:00

13°

km/h

85%

14:00

13°

km/h

90%

15:00

14°

km/h

89%

16:00

14°

km/h

86%

Daily forecast

San Mateo County air quality index (AQI⁺) forecast

Today

16°

11°

km/h

84%

Sun

17°

12°

km/h

74%

Mon

14°

11°

km/h

89%

Air pollutants

What is the current air quality in San Mateo County?

PM2.5 concentration currently meets the WHO annual PM2.5 guideline.

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.

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

Pollen

What is the pollen count in San Mateo County today?

Index

Moderate

Tree

Low

25%

Grass

None

Weed

Moderate

50%

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

Moderate

Tree

Low

25%

Grass

None

Weed

Moderate

50%

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	Belle Roche Court	14
2	265 Old Spanish Trail	13
3	Cerrito Avenue	13
4	920 Bear Gulch Road	11
5	Alpine Road	11
6	Arlington Way	11
7	Burlingame Hills	10
8	Alexander Avenue	9
9	Dirt Alpine	9
10	480 Tunitas Creek Road	8

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Englewood, Colorado	124
2	Shaver Lake, California	115
3	Glendale, Arapahoe County, Colorado	113
4	Falcon Heights, Minnesota	103
5	Tulsa County, Oklahoma	99
6	Castle Rock, Colorado	93
7	Lilydale, Minnesota	92
8	Littleton, Colorado	89
9	Ester, Alaska	87
10	Springfield, Oregon	81

History

Historic air quality graph for San Mateo County

11 AQI⁺ US

Good

17:00–18:00 Oct 31 Local time

AQI⁺ US

History

Historic air quality graph for San Mateo County

11 AQI⁺ US

Good

17:00–18:00 Oct 31 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	Belle Roche Court	14
2	265 Old Spanish Trail	13
3	Cerrito Avenue	13
4	920 Bear Gulch Road	11
5	Alpine Road	11
6	Arlington Way	11
7	Burlingame Hills	10
8	Alexander Avenue	9
9	Dirt Alpine	9
10	480 Tunitas Creek Road	8

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Englewood, Colorado	124
2	Shaver Lake, California	115
3	Glendale, Arapahoe County, Colorado	113
4	Falcon Heights, Minnesota	103
5	Tulsa County, Oklahoma	99
6	Castle Rock, Colorado	93
7	Lilydale, Minnesota	92
8	Littleton, Colorado	89
9	Ester, Alaska	87
10	Springfield, Oregon	81