WorldArrow icon
Arrow icon100-198 E 4th Ave

Air quality near 100-198 E 4th Ave, Boulder

Air quality index (AQI⁺) and PM2.5 air pollution near 100-198 E 4th Ave, Boulder • 3 Followers • 21:00, May 13 Local time

Data source: PurpleAir

13

US AQI⁺

Good

face expression based on aqi value

Main pollutant:

PM2.5

2.4 µg/m³

weather condition icon

7°

wind direction icon

27 km/h

weather humid icon

63 %

Data source: PurpleAir

Hourly forecast

100-198 E 4th Ave, Boulder air quality index (AQI⁺) forecast

Now

13

Weather icon

7°

IQAir AirVisual Air Quality Map Wind rotating 274 degree

27

km/h

Humidity icon

63%

22:00

13

Weather icon

6°

IQAir AirVisual Air Quality Map Wind rotating 267 degree

28

km/h

Humidity icon

59%

23:00

12

Weather icon

6°

IQAir AirVisual Air Quality Map Wind rotating 260 degree

29

km/h

Humidity icon

60%

Thu

00:00

11

Weather icon

6°

IQAir AirVisual Air Quality Map Wind rotating 257 degree

25

km/h

Humidity icon

63%

01:00

11

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 256 degree

29

km/h

Humidity icon

62%

02:00

10

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 259 degree

28

km/h

Humidity icon

63%

03:00

10

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 260 degree

30

km/h

Humidity icon

63%

04:00

9

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 260 degree

27

km/h

Humidity icon

65%

05:00

8

Weather icon

4°

IQAir AirVisual Air Quality Map Wind rotating 260 degree

24

km/h

Humidity icon

66%

06:00

8

Weather icon

4°

IQAir AirVisual Air Quality Map Wind rotating 255 degree

20

km/h

Humidity icon

66%

07:00

7

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 252 degree

19

km/h

Humidity icon

62%

08:00

7

Weather icon

6°

IQAir AirVisual Air Quality Map Wind rotating 251 degree

21

km/h

Humidity icon

56%

09:00

6

Weather icon

8°

IQAir AirVisual Air Quality Map Wind rotating 252 degree

24

km/h

Humidity icon

49%

10:00

6

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 254 degree

26

km/h

Humidity icon

43%

11:00

6

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 258 degree

26

km/h

Humidity icon

37%

12:00

6

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 260 degree

26

km/h

Humidity icon

31%

13:00

6

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 263 degree

27

km/h

Humidity icon

28%

14:00

6

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 264 degree

26

km/h

Humidity icon

25%

15:00

6

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 264 degree

25

km/h

Humidity icon

23%

16:00

6

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 264 degree

26

km/h

Humidity icon

21%

17:00

6

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 266 degree

26

km/h

Humidity icon

22%

18:00

7

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 267 degree

24

km/h

Humidity icon

22%

19:00

7

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 267 degree

22

km/h

Humidity icon

21%

20:00

8

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 269 degree

19

km/h

Humidity icon

23%

21:00

9

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 273 degree

16

km/h

Humidity icon

24%

22:00

8

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 278 degree

17

km/h

Humidity icon

24%

23:00

8

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 278 degree

15

km/h

Humidity icon

29%

Fri

00:00

8

Weather icon

7°

IQAir AirVisual Air Quality Map Wind rotating 277 degree

11

km/h

Humidity icon

38%

01:00

8

Weather icon

7°

IQAir AirVisual Air Quality Map Wind rotating 274 degree

12

km/h

Humidity icon

38%

02:00

9

Weather icon

6°

IQAir AirVisual Air Quality Map Wind rotating 271 degree

12

km/h

Humidity icon

40%

03:00

10

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 267 degree

10

km/h

Humidity icon

42%

04:00

9

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 280 degree

8

km/h

Humidity icon

46%

05:00

9

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 277 degree

5

km/h

Humidity icon

54%

06:00

9

Weather icon

4°

IQAir AirVisual Air Quality Map Wind rotating 255 degree

6

km/h

Humidity icon

63%

07:00

8

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 266 degree

10

km/h

Humidity icon

62%

08:00

7

Weather icon

6°

IQAir AirVisual Air Quality Map Wind rotating 271 degree

16

km/h

Humidity icon

54%

09:00

6

Weather icon

7°

IQAir AirVisual Air Quality Map Wind rotating 272 degree

18

km/h

Humidity icon

49%

10:00

6

Weather icon

8°

IQAir AirVisual Air Quality Map Wind rotating 271 degree

22

km/h

Humidity icon

43%

11:00

6

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 272 degree

24

km/h

Humidity icon

37%

12:00

6

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 271 degree

26

km/h

Humidity icon

29%

13:00

6

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 267 degree

27

km/h

Humidity icon

27%

14:00

6

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 265 degree

28

km/h

Humidity icon

24%

15:00

6

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 266 degree

27

km/h

Humidity icon

21%

16:00

6

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 269 degree

27

km/h

Humidity icon

20%

17:00

6

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 271 degree

25

km/h

Humidity icon

20%

18:00

6

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 275 degree

24

km/h

Humidity icon

20%

19:00

6

Weather icon

12°

IQAir AirVisual Air Quality Map Wind rotating 297 degree

32

km/h

Humidity icon

24%

20:00

6

Weather icon

10°

IQAir AirVisual Air Quality Map Wind rotating 311 degree

23

km/h

Humidity icon

30%

21:00

6

Weather icon

7°

IQAir AirVisual Air Quality Map Wind rotating 323 degree

18

km/h

Humidity icon

36%

22:00

6

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 321 degree

15

km/h

Humidity icon

42%

23:00

6

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 312 degree

13

km/h

Humidity icon

45%

Sat

00:00

7

Weather icon

4°

IQAir AirVisual Air Quality Map Wind rotating 298 degree

10

km/h

Humidity icon

45%

01:00

7

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 290 degree

8

km/h

Humidity icon

45%

02:00

7

Weather icon

5°

IQAir AirVisual Air Quality Map Wind rotating 299 degree

7

km/h

Humidity icon

46%

03:00

8

Weather icon

6°

IQAir AirVisual Air Quality Map Wind rotating 298 degree

8

km/h

Humidity icon

47%

04:00

7

Weather icon

6°

IQAir AirVisual Air Quality Map Wind rotating 304 degree

5

km/h

Humidity icon

46%

05:00

7

Weather icon

6°

IQAir AirVisual Air Quality Map Wind rotating 189 degree

2

km/h

Humidity icon

46%

06:00

7

Weather icon

6°

IQAir AirVisual Air Quality Map Wind rotating 188 degree

3

km/h

Humidity icon

46%

07:00

8

Weather icon

7°

IQAir AirVisual Air Quality Map Wind rotating 225 degree

2

km/h

Humidity icon

44%

08:00

9

Weather icon

8°

IQAir AirVisual Air Quality Map Wind rotating 230 degree

2

km/h

Humidity icon

42%

09:00

10

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 254 degree

3

km/h

Humidity icon

40%

10:00

10

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 209 degree

15

km/h

Humidity icon

37%

11:00

10

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 206 degree

26

km/h

Humidity icon

35%

12:00

11

Weather icon

13°

IQAir AirVisual Air Quality Map Wind rotating 238 degree

25

km/h

Humidity icon

33%

13:00

11

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 220 degree

27

km/h

Humidity icon

32%

14:00

12

Weather icon

15°

IQAir AirVisual Air Quality Map Wind rotating 234 degree

26

km/h

Humidity icon

28%

15:00

13

Weather icon

14°

IQAir AirVisual Air Quality Map Wind rotating 246 degree

24

km/h

Humidity icon

29%

16:00

12

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 272 degree

32

km/h

Humidity icon

25%

17:00

11

Weather icon

11°

IQAir AirVisual Air Quality Map Wind rotating 312 degree

30

km/h

Humidity icon

44%

18:00

11

Weather icon

9°

IQAir AirVisual Air Quality Map Wind rotating 325 degree

28

km/h

Humidity icon

44%

19:00

10

Weather icon

8°

IQAir AirVisual Air Quality Map Wind rotating 324 degree

25

km/h

Humidity icon

46%

20:00

9

Weather icon

7°

IQAir AirVisual Air Quality Map Wind rotating 322 degree

20

km/h

Humidity icon

44%

Daily forecast

|

100-198 E 4th Ave, Boulder air quality index (AQI⁺) forecast

Today

8

Weather icon

15°

4°

IQAir AirVisual Air Quality Map Wind rotating 270 degree

27

km/h

Humidity icon

34%

Thu

8

Weather icon

14°

4°

IQAir AirVisual Air Quality Map Wind rotating 270 degree

32

km/h

Humidity icon

35%

Fri

9

Weather icon

15°

3°

IQAir AirVisual Air Quality Map Wind rotating 225 degree

32

km/h

Humidity icon

39%

Air pollutants

What is the current air quality near 100-198 E 4th Ave?

IQAir Check icon

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

Health recommendations

common.healthRecommendationComp.icons.exerciseAlt

Enjoy outdoor activities

common.healthRecommendationComp.icons.windowAlt

Open your windows to bring clean, fresh air indoors

Get a monitor

Real-time 100-198 E 4th Ave, Boulder air pollution map

Pollen

What is the pollen count in 100-198 E 4th Ave today?

Index

Pollen global icon

Low

Pollen tree icon

Tree

Low

25%
Pollen grass icon

Grass

None

0%
Pollen weed icon

Weed

None

0%

Source:

wetter.com
Pollen forecast

Protect yourself from air pollution in 100-198 E 4th Ave

SHOP IQAIR PRODUCTS

Air Purifiers

Face Masks

Air Quality Monitors

Pollen

What is the pollen count in 100-198 E 4th Ave today?

Index

Pollen global icon

Low

Pollen tree icon

Tree

Low

25%
Pollen grass icon

Grass

None

0%
Pollen weed icon

Weed

None

0%

Source:

wetter.com
Pollen forecast

History

Historic air quality graph for 100-198 E 4th Ave

13 AQI⁺ US
Good
20:00–21:00 May 13 Local time
AQI⁺ US

Measure your own air quality

Get a monitor and contribute air quality data in your city.

Get a monitorHow to contribute

Most polluted locations near 100-198 E 4th Ave, Boulder

Worldwide AQI⁺ rankingarrow right icon

Station ranking

Real-time 100-198 E 4th Ave AQI⁺ station ranking

#StationsAQI⁺ US
1
The national flag of USA

100-198 E 4th Ave

13

City ranking

Real-time USA AQI⁺ city ranking

#CitiesAQI⁺ US
1
The national flag of USA

Indio, California

86

2
The national flag of USA

West University Place, Texas

75

3
The national flag of USA

Dripping Springs, Texas

69

4
The national flag of USA

Baytown, Texas

64

5
The national flag of USA

Warren, New York

62

6
The national flag of USA

Carlsbad, New Mexico

61

7
The national flag of USA

Crestline, California

61

8
The national flag of USA

Kingston, New York

61

9
The national flag of USA

Port Arthur, Texas

61

10
The national flag of USA

Austin, Texas

60

Get comprehensive data about air quality in 100-198 E 4th Ave, Boulder

Download our Air Quality App

Download AirVisual app on App StoreDownload AirVisual app on Google PlayDownload AirVisual app on Android
Polluted skies of Sao Paulo
external link icon

May 13, 2026: São Paulo among top 10 most polluted cities in the world

Forest wildfire sending thick smoke into the sky
external link icon

Wildfire Map Spotlight: Max Road Miramar Fire, Florida

external link icon

May 13, 2026: Delhi among top 10 most polluted cities in the world

Where is the cleanest air quality in Boulder?