4300 C St SE, Washington, DC 20019 Air Quality

Monitoring Station · H Street NE, United States

22

Good

Air quality is satisfactory. Enjoy outdoor activities.

Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous

AQI Forecast Calibrated

25 8pm

22

26

26 11pm

26

26

24 2am

24

26

26 5am

24

24

24 8am

24

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— 11am

—

—

— 2pm

—

—

— 5pm

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Station readings

25

22

CAMS model adj -1

27

27

27

27

27

27

25

25

27

27

25

25

25

25

Air Quality Forecast (24h)

PM2.55.3 µg/m³ ✓ WHO

Good

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Nearby Monitoring Stations

Friendship Collegiate

1.1 km PM2.5: 8.1 µg/m³

1.6 km PM2.5: 7.7 µg/m³

1.8 km PM2.5: 7.9 µg/m³

Kingman Island - Heritage Island Bridge

1.9 km PM2.5: 7.1 µg/m³

330 21st St NE, Washington, DC 20002

2.6 km PM2.5: 5.1 µg/m³

Friendship Blow Pierce

2.8 km PM2.5: 6.8 µg/m³

Lee Montessori R St

3.0 km PM2.5: 7.5 µg/m³

Friendship Chamberlain

3.5 km PM2.5: 10.6 µg/m³

Nearby Cities

35 H Street NE 36 Capitol Hill 34 Suitland 34 Suitland-Silver Hill 35 Capitol Riverfront 35 NoMa 36 Northwest One 37 Southwest Waterfront 34 Hillcrest Heights

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-07-21T23:03 UTC.