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Air quality in San Marcos

Air quality index (AQI⁺) and PM2.5 air pollution in San Marcos • 911 Followers • 11:00, Sep 18 Local time

US AQI⁺

Good

Main pollutant:

O₃

64 µg/m³

32°

12 km/h

59 %

Hourly forecast

San Marcos air quality index (AQI⁺) forecast

Now

32°

km/h

59%

13:00

33°

km/h

52%

14:00

34°

km/h

47%

15:00

35°

km/h

44%

16:00

35°

km/h

40%

17:00

35°

km/h

37%

18:00

35°

km/h

36%

19:00

34°

km/h

38%

20:00

32°

km/h

43%

21:00

30°

km/h

48%

22:00

29°

km/h

49%

23:00

28°

km/h

61%

Sat

00:00

27°

km/h

74%

01:00

26°

km/h

79%

02:00

25°

km/h

85%

03:00

24°

km/h

90%

04:00

25°

km/h

83%

05:00

25°

km/h

84%

06:00

24°

km/h

92%

07:00

23°

km/h

94%

08:00

23°

km/h

93%

09:00

25°

km/h

86%

10:00

27°

km/h

72%

11:00

29°

km/h

67%

12:00

31°

km/h

48%

13:00

33°

km/h

42%

14:00

34°

km/h

37%

15:00

35°

km/h

33%

16:00

35°

km/h

33%

17:00

35°

km/h

39%

18:00

34°

km/h

41%

19:00

33°

km/h

48%

20:00

30°

km/h

57%

21:00

29°

km/h

60%

22:00

29°

km/h

59%

23:00

27°

km/h

68%

Sun

00:00

27°

km/h

76%

01:00

25°

km/h

81%

02:00

24°

km/h

84%

03:00

24°

km/h

86%

04:00

23°

km/h

89%

05:00

23°

km/h

92%

06:00

22°

km/h

93%

07:00

23°

km/h

94%

08:00

24°

km/h

84%

09:00

26°

km/h

74%

10:00

29°

km/h

62%

11:00

31°

km/h

52%

12:00

33°

km/h

44%

13:00

34°

km/h

38%

14:00

36°

km/h

32%

15:00

37°

km/h

28%

16:00

37°

km/h

25%

17:00

38°

km/h

24%

18:00

37°

km/h

25%

19:00

35°

km/h

28%

20:00

32°

km/h

47%

21:00

31°

km/h

49%

22:00

29°

km/h

58%

23:00

28°

km/h

66%

Mon

00:00

27°

km/h

71%

01:00

26°

km/h

76%

02:00

26°

km/h

79%

03:00

25°

km/h

83%

04:00

25°

km/h

86%

05:00

25°

km/h

87%

06:00

25°

km/h

88%

07:00

24°

km/h

88%

08:00

25°

km/h

84%

09:00

27°

km/h

73%

10:00

29°

km/h

62%

11:00

32°

km/h

51%

Daily forecast

San Marcos air quality index (AQI⁺) forecast

Today

35°

26°

km/h

57%

Sat

35°

23°

km/h

59%

Sun

38°

22°

km/h

50%

Air pollutants

What is the current air quality in San Marcos?

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

Real-time San Marcos 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 Marcos

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 Marcos today?

Index

Low

Tree

None

Grass

None

Weed

Low

25%

Source:

wetter.com

Pollen forecast in San Marcos

Health recommendations

Enjoy outdoor activities

Open your windows to bring clean, fresh air indoors

Get a monitor

Real-time San Marcos air pollution map

Pollen

What is the pollen count in San Marcos today?

Index

Low

Tree

None

Grass

None

Weed

Low

25%

Source:

wetter.com

Pollen forecast in San Marcos

Protect yourself from air pollution in San Marcos

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 Marcos

Worldwide AQI⁺ ranking

Station ranking

Real-time AQI⁺ station ranking for stations in San Marcos

#	Stations	AQI⁺ US
1	CAPCOG San Marcos Staples Road	41
2	Hays County Health Department	26

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Mono, California	90
2	Montgomery County, North Carolina	87
3	Helena, Montana	84
4	El Portal, California	77
5	Gardnerville Ranchos, Nevada	76
6	Bear Valley, Alpine County, California	75
7	Beaumont, California	75
8	Alpine County, California	73
9	Crestline, California	71
10	Memphis, Tennessee	71

History

Historic air quality graph for San Marcos

26 AQI⁺ US

Good

10:00–11:00 Sep 18 Local time

AQI⁺ US

History

Historic air quality graph for San Marcos

26 AQI⁺ US

Good

10:00–11:00 Sep 18 Local time

AQI⁺ US

Most polluted locations near San Marcos

Worldwide AQI⁺ ranking

Station ranking

Real-time AQI⁺ station ranking for stations in San Marcos

#	Stations	AQI⁺ US
1	CAPCOG San Marcos Staples Road	41
2	Hays County Health Department	26

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Mono, California	90
2	Montgomery County, North Carolina	87
3	Helena, Montana	84
4	El Portal, California	77
5	Gardnerville Ranchos, Nevada	76
6	Bear Valley, Alpine County, California	75
7	Beaumont, California	75
8	Alpine County, California	73
9	Crestline, California	71
10	Memphis, Tennessee	71