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Air quality in Waltham

Air quality index (AQI⁺) and PM2.5 air pollution in Waltham • 9.1K Followers • 15:00, Apr 30

Milford AQI Alert nearby

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US AQI⁺

Good

Main pollutant:

PM2.5

2 µg/m³

11°

3 km/h

81 %

Hourly forecast

Waltham air quality index (AQI⁺) forecast

Now

11°

km/h

81%

16:00

12°

km/h

75%

17:00

12°

km/h

81%

18:00

12°

km/h

79%

19:00

12°

km/h

80%

20:00

12°

km/h

83%

21:00

11°

km/h

84%

22:00

11°

km/h

84%

23:00

11°

km/h

86%

Fri

00:00

11°

km/h

90%

01:00

11°

km/h

89%

02:00

90%

10°

km/h

93%

03:00

10°

km/h

92%

04:00

9°

km/h

78%

05:00

8°

km/h

75%

06:00

7°

km/h

74%

07:00

7°

km/h

73%

08:00

8°

km/h

67%

09:00

9°

km/h

60%

10:00

11°

km/h

54%

11:00

12°

km/h

49%

12:00

14°

km/h

44%

13:00

15°

km/h

40%

14:00

16°

km/h

38%

15:00

16°

km/h

37%

16:00

16°

km/h

33%

17:00

16°

km/h

32%

18:00

16°

km/h

34%

19:00

15°

km/h

39%

20:00

14°

km/h

46%

21:00

14°

km/h

45%

22:00

13°

km/h

47%

23:00

12°

km/h

53%

Sat

00:00

12°

km/h

54%

01:00

11°

km/h

58%

02:00

11°

km/h

56%

03:00

11°

km/h

58%

04:00

10°

km/h

64%

05:00

10°

km/h

67%

06:00

10°

km/h

66%

07:00

10°

km/h

68%

08:00

11°

km/h

66%

09:00

13°

km/h

63%

10:00

13°

km/h

63%

11:00

14°

km/h

62%

12:00

90%

13°

km/h

70%

13:00

90%

13°

km/h

76%

14:00

90%

12°

km/h

80%

15:00

13°

km/h

77%

16:00

15°

km/h

65%

17:00

14°

km/h

56%

18:00

13°

km/h

68%

19:00

13°

km/h

63%

20:00

12°

km/h

77%

21:00

7°

km/h

93%

22:00

7°

km/h

92%

23:00

7°

km/h

93%

Sun

00:00

7°

km/h

93%

01:00

7°

km/h

93%

02:00

7°

km/h

93%

03:00

7°

km/h

93%

04:00

7°

km/h

91%

05:00

7°

km/h

92%

06:00

7°

km/h

92%

07:00

7°

km/h

87%

08:00

8°

km/h

83%

09:00

9°

km/h

77%

10:00

80%

10°

km/h

71%

11:00

10°

km/h

69%

12:00

11°

km/h

61%

13:00

12°

km/h

58%

14:00

14°

km/h

40%

Daily forecast

Waltham air quality index (AQI⁺) forecast

Today

12°

8°

km/h

83%

Fri

16°

7°

km/h

48%

Sat

15°

7°

km/h

71%

Air pollutants

What is the current air quality in Waltham?

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

Real-time Waltham 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 Waltham

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 Waltham today?

Index

None

Tree None	0%
Grass None	0%
Weed None	0%

Source:

wetter.com

Pollen forecast in Waltham

Health recommendations

Enjoy outdoor activities

Open your windows to bring clean, fresh air indoors

Get a monitor

Real-time Waltham air pollution map

Pollen

What is the pollen count in Waltham today?

Index

None

Tree None	0%
Grass None	0%
Weed None	0%

Source:

wetter.com

Pollen forecast in Waltham

Protect yourself from air pollution in Waltham

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 Waltham

Worldwide AQI⁺ ranking

Station ranking

Real-time AQI⁺ station ranking for stations in Waltham

#	Stations	AQI⁺ US
1	Moody St near the river	13
2	331-379 US-20	9

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Casa Grande, Arizona	86
2	Mission, Texas	81
3	Port Arthur, Texas	78
4	East Los Angeles, California	74
5	Huntington Park, California	74
6	Florence-Graham, California	73
7	Calexico, California	72
8	Pahrump, Nevada	69
9	South Gate, California	69
10	Burbank, Los Angeles County, California	68

History

Historic air quality graph for Waltham

11 AQI⁺ US

Good

14:00–15:00 Apr 30

AQI⁺ US

History

Historic air quality graph for Waltham

11 AQI⁺ US

Good

14:00–15:00 Apr 30

AQI⁺ US

Most polluted locations near Waltham

Worldwide AQI⁺ ranking

Station ranking

Real-time AQI⁺ station ranking for stations in Waltham

#	Stations	AQI⁺ US
1	Moody St near the river	13
2	331-379 US-20	9

City ranking

Real-time USA AQI⁺ city ranking

#	Cities	AQI⁺ US
1	Casa Grande, Arizona	86
2	Mission, Texas	81
3	Port Arthur, Texas	78
4	East Los Angeles, California	74
5	Huntington Park, California	74
6	Florence-Graham, California	73
7	Calexico, California	72
8	Pahrump, Nevada	69
9	South Gate, California	69
10	Burbank, Los Angeles County, California	68