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Air quality in San Mateo County

Air quality index (AQI⁺) and PM2.5 air pollution in San Mateo County • 14 Followers • 09:00, May 19 Local time

US AQI⁺

Good

Main pollutant:

PM2.5

4.5 µg/m³

19°

9 km/h

32 %

Hourly forecast

San Mateo County air quality index (AQI⁺) forecast

Now

19°

km/h

32%

10:00

20°

km/h

26%

11:00

22°

km/h

24%

12:00

23°

km/h

21%

13:00

23°

km/h

20%

14:00

23°

km/h

21%

15:00

23°

km/h

27%

16:00

22°

km/h

34%

17:00

21°

km/h

33%

18:00

20°

km/h

30%

19:00

18°

km/h

27%

20:00

17°

km/h

27%

21:00

17°

km/h

27%

22:00

17°

km/h

27%

23:00

18°

km/h

24%

Wed

00:00

18°

km/h

23%

01:00

18°

km/h

21%

02:00

17°

km/h

23%

03:00

17°

km/h

21%

04:00

16°

km/h

22%

05:00

16°

km/h

21%

06:00

16°

km/h

20%

07:00

16°

km/h

24%

08:00

16°

km/h

39%

09:00

18°

km/h

47%

10:00

19°

km/h

65%

11:00

20°

km/h

66%

12:00

20°

km/h

59%

13:00

21°

km/h

59%

14:00

21°

km/h

55%

15:00

21°

km/h

51%

16:00

21°

km/h

42%

17:00

18°

km/h

47%

18:00

18°

km/h

50%

19:00

17°

km/h

55%

20:00

15°

km/h

58%

21:00

15°

km/h

46%

22:00

15°

km/h

38%

23:00

15°

km/h

38%

Thu

00:00

15°

km/h

38%

01:00

15°

km/h

39%

02:00

14°

km/h

42%

03:00

14°

km/h

42%

04:00

14°

km/h

38%

05:00

14°

km/h

36%

06:00

8°

km/h

96%

07:00

10°

km/h

85%

08:00

14°

km/h

64%

09:00

17°

km/h

47%

10:00

20°

km/h

38%

11:00

21°

km/h

34%

12:00

22°

km/h

37%

13:00

21°

km/h

40%

14:00

21°

km/h

44%

15:00

19°

km/h

53%

16:00

16°

km/h

66%

17:00

16°

km/h

62%

18:00

16°

km/h

60%

19:00

15°

km/h

64%

20:00

12°

km/h

81%

21:00

11°

km/h

87%

22:00

10°

km/h

86%

23:00

10°

km/h

86%

Fri

00:00

10°

km/h

84%

01:00

10°

km/h

89%

02:00

9°

km/h

94%

03:00

9°

km/h

95%

04:00

9°

km/h

95%

05:00

9°

km/h

95%

06:00

9°

km/h

95%

07:00

11°

km/h

90%

08:00

14°

km/h

71%

Daily forecast

San Mateo County air quality index (AQI⁺) forecast

Today

23°

17°

km/h

27%

Wed

21°

15°

km/h

48%

Thu

22°

8°

km/h

61%

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

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

Moderate

Tree

Low

25%

Grass

Low

25%

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

Low

25%

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	31
2	265 Old Spanish Trail	27
3	920 Bear Gulch Road	27
4	Burlingame Hills	25
5	Alpine Road	23
6	Dirt Alpine	23
7	Bear Gulch Road	22
8	Cerrito Avenue	19
9	Alexander Avenue	18
10	480 Tunitas Creek Road	11

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Gardena, California	102
2	Santa Barbara County, California	99
3	Signal Hill, California	97
4	Hacienda Heights, California	96
5	Inglewood, California	96
6	Jurupa Valley, California	94
7	Rumford, Maine	94
8	West Carson, California	93
9	Manhattan Beach, California	91
10	Culver City, California	90

History

Historic air quality graph for San Mateo County

24 AQI⁺ US

Good

08:00–09:00 May 19 Local time

AQI⁺ US

History

Historic air quality graph for San Mateo County

24 AQI⁺ US

Good

08:00–09:00 May 19 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	31
2	265 Old Spanish Trail	27
3	920 Bear Gulch Road	27
4	Burlingame Hills	25
5	Alpine Road	23
6	Dirt Alpine	23
7	Bear Gulch Road	22
8	Cerrito Avenue	19
9	Alexander Avenue	18
10	480 Tunitas Creek Road	11

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Gardena, California	102
2	Santa Barbara County, California	99
3	Signal Hill, California	97
4	Hacienda Heights, California	96
5	Inglewood, California	96
6	Jurupa Valley, California	94
7	Rumford, Maine	94
8	West Carson, California	93
9	Manhattan Beach, California	91
10	Culver City, California	90