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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 • 14:00, May 31 Local time

US AQI⁺

Good

Main pollutant:

PM2.5

5.3 µg/m³

18°

3 km/h

64 %

Hourly forecast

San Mateo County air quality index (AQI⁺) forecast

Now

18°

km/h

64%

15:00

17°

km/h

67%

16:00

17°

km/h

70%

17:00

17°

km/h

69%

18:00

16°

km/h

69%

19:00

16°

km/h

69%

20:00

15°

km/h

72%

21:00

15°

km/h

68%

22:00

16°

km/h

56%

23:00

16°

km/h

51%

Mon

00:00

16°

km/h

52%

01:00

17°

km/h

45%

02:00

16°

km/h

44%

03:00

16°

km/h

38%

04:00

16°

km/h

35%

05:00

15°

km/h

36%

06:00

16°

km/h

33%

07:00

16°

km/h

38%

08:00

17°

km/h

51%

09:00

18°

km/h

63%

10:00

19°

km/h

70%

11:00

20°

km/h

63%

12:00

20°

km/h

59%

13:00

21°

km/h

61%

14:00

20°

km/h

66%

15:00

19°

km/h

66%

16:00

19°

km/h

59%

17:00

18°

km/h

58%

18:00

18°

km/h

63%

19:00

17°

km/h

62%

20:00

16°

km/h

67%

21:00

15°

km/h

56%

22:00

16°

km/h

49%

23:00

16°

km/h

49%

Tue

00:00

15°

km/h

52%

01:00

13°

km/h

64%

02:00

11°

km/h

70%

03:00

12°

km/h

65%

04:00

13°

km/h

58%

05:00

13°

km/h

56%

06:00

13°

km/h

55%

07:00

13°

km/h

59%

08:00

13°

km/h

72%

09:00

14°

km/h

69%

10:00

17°

km/h

69%

11:00

19°

km/h

68%

12:00

17°

km/h

73%

13:00

16°

km/h

67%

14:00

15°

km/h

67%

15:00

17°

km/h

64%

16:00

16°

km/h

62%

17:00

15°

km/h

64%

18:00

14°

km/h

79%

19:00

13°

km/h

82%

20:00

12°

km/h

90%

21:00

11°

km/h

98%

22:00

10°

km/h

98%

23:00

10°

km/h

98%

Wed

00:00

10°

km/h

98%

01:00

10°

km/h

98%

02:00

10°

km/h

97%

03:00

11°

km/h

92%

04:00

11°

km/h

92%

05:00

11°

km/h

92%

06:00

11°

km/h

92%

07:00

11°

km/h

89%

08:00

12°

km/h

85%

09:00

13°

km/h

78%

10:00

15°

km/h

67%

11:00

17°

km/h

60%

12:00

18°

km/h

54%

13:00

20°

km/h

45%

Daily forecast

San Mateo County air quality index (AQI⁺) forecast

Today

18°

8°

km/h

75%

Mon

21°

15°

km/h

58%

Tue

19°

10°

km/h

73%

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

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

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	Alberta Glen	36
2	Alexander Avenue	32
3	Arlington Way	32
4	Durham Road	30
5	265 Old Spanish Trail	29
6	480 Tunitas Creek Road	28
7	920 Bear Gulch Road	28
8	Dirt Alpine	26
9	Alpine Road	24
10	Bear Gulch Road	3

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Stafford, Virginia	74
2	Little Rock, Arkansas	63
3	Jurupa Valley, California	61
4	Des Moines, Iowa	60
5	Santa Clarita, California	60
6	East Los Angeles, California	59
7	El Paso, Texas	59
8	Glendora, California	58
9	Florence-Graham, California	57
10	Huntington Park, California	57

History

Historic air quality graph for San Mateo County

29 AQI⁺ US

Good

13:00–14:00 May 31 Local time

AQI⁺ US

History

Historic air quality graph for San Mateo County

29 AQI⁺ US

Good

13:00–14:00 May 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	Alberta Glen	36
2	Alexander Avenue	32
3	Arlington Way	32
4	Durham Road	30
5	265 Old Spanish Trail	29
6	480 Tunitas Creek Road	28
7	920 Bear Gulch Road	28
8	Dirt Alpine	26
9	Alpine Road	24
10	Bear Gulch Road	3

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Stafford, Virginia	74
2	Little Rock, Arkansas	63
3	Jurupa Valley, California	61
4	Des Moines, Iowa	60
5	Santa Clarita, California	60
6	East Los Angeles, California	59
7	El Paso, Texas	59
8	Glendora, California	58
9	Florence-Graham, California	57
10	Huntington Park, California	57