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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 • 18:00, Jun 03 Local time

US AQI⁺

Good

Main pollutant:

PM2.5

3.8 µg/m³

15°

18 km/h

73 %

Hourly forecast

San Mateo County air quality index (AQI⁺) forecast

Now

15°

km/h

73%

19:00

13°

km/h

76%

20:00

12°

km/h

87%

21:00

11°

km/h

98%

22:00

11°

km/h

97%

23:00

11°

km/h

97%

Thu

00:00

90%

11°

km/h

98%

01:00

90%

10°

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%

10°

km/h

95%

06:00

11°

km/h

82%

07:00

12°

km/h

84%

08:00

13°

km/h

89%

09:00

14°

km/h

86%

10:00

15°

km/h

81%

11:00

90%

16°

km/h

77%

12:00

16°

km/h

72%

13:00

17°

km/h

71%

14:00

16°

km/h

70%

15:00

16°

km/h

70%

16:00

90%

15°

km/h

68%

17:00

90%

15°

km/h

68%

18:00

14°

km/h

67%

19:00

90%

13°

km/h

68%

20:00

90%

13°

km/h

69%

21:00

13°

km/h

69%

22:00

12°

km/h

69%

23:00

90%

12°

km/h

74%

Fri

00:00

11°

km/h

79%

01:00

90%

11°

km/h

83%

02:00

10°

km/h

85%

03:00

9°

km/h

86%

04:00

90%

9°

km/h

90%

05:00

90%

9°

km/h

91%

06:00

9°

km/h

94%

07:00

11°

km/h

78%

08:00

13°

km/h

81%

09:00

14°

km/h

79%

10:00

16°

km/h

77%

11:00

17°

km/h

73%

12:00

18°

km/h

69%

13:00

19°

km/h

68%

14:00

18°

km/h

72%

15:00

17°

km/h

69%

16:00

16°

km/h

62%

17:00

15°

km/h

75%

18:00

16°

km/h

59%

19:00

15°

km/h

65%

20:00

13°

km/h

75%

21:00

12°

km/h

82%

22:00

11°

km/h

86%

23:00

11°

km/h

86%

Sat

00:00

11°

km/h

86%

01:00

11°

km/h

87%

02:00

10°

km/h

87%

03:00

10°

km/h

88%

04:00

10°

km/h

86%

05:00

10°

km/h

85%

06:00

10°

km/h

84%

07:00

11°

km/h

78%

08:00

12°

km/h

68%

09:00

13°

km/h

63%

10:00

14°

km/h

58%

11:00

15°

km/h

57%

12:00

15°

km/h

56%

13:00

15°

km/h

57%

14:00

16°

km/h

56%

15:00

16°

km/h

58%

16:00

15°

km/h

61%

17:00

14°

km/h

63%

Daily forecast

San Mateo County air quality index (AQI⁺) forecast

Today

17°

11°

km/h

74%

Thu

19°

9°

km/h

74%

Fri

16°

10°

km/h

67%

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

High

Tree

Low

25%

Grass

High

75%

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

High

Tree

Low

25%

Grass

High

75%

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	Arlington Way	34
2	265 Old Spanish Trail	25
3	Belle Roche Court	23
4	Cerrito Avenue	22
5	920 Bear Gulch Road	21
6	Alberta Glen	20
7	Alexander Avenue	20
8	Alpine Road	18
9	480 Tunitas Creek Road	16
10	Bear Gulch Road	3

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Redlands, California	83
2	Santa Clarita, California	83
3	Glendora, California	82
4	Sioux Falls, South Dakota	74
5	Jurupa Valley, California	72
6	Palm Springs, California	71
7	Apache Junction, Arizona	67
8	Cary, Illinois	65
9	Claremont, California	64
10	San Bernardino County, California	64

History

Historic air quality graph for San Mateo County

21 AQI⁺ US

Good

17:00–18:00 Jun 03 Local time

AQI⁺ US

History

Historic air quality graph for San Mateo County

21 AQI⁺ US

Good

17:00–18:00 Jun 03 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	Arlington Way	34
2	265 Old Spanish Trail	25
3	Belle Roche Court	23
4	Cerrito Avenue	22
5	920 Bear Gulch Road	21
6	Alberta Glen	20
7	Alexander Avenue	20
8	Alpine Road	18
9	480 Tunitas Creek Road	16
10	Bear Gulch Road	3

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Redlands, California	83
2	Santa Clarita, California	83
3	Glendora, California	82
4	Sioux Falls, South Dakota	74
5	Jurupa Valley, California	72
6	Palm Springs, California	71
7	Apache Junction, Arizona	67
8	Cary, Illinois	65
9	Claremont, California	64
10	San Bernardino County, California	64