AQI

Washington Air Quality Index & Realtime Air Pollution

Live AQI
27(AQI-US)
Air Quality is
Good
PM2.5 :6.5µg/m³
PM10 :6.9µg/m³
Good
Moderate
Poor
Unhealthy
Severe
Hazardous
050100150200300301+
Good air quality mascot

Primary Air Pollutants Washington (District of Columbia)

PM2.57µg/m³
PM2.5
Fine particles
PM107µg/m³
PM10
Coarse particles
SO₂1µg/m³
SO₂
Sulphur dioxide
CO147µg/m³
CO
Carbon monoxide
NO₂4µg/m³
NO₂
Nitrogen dioxide
O₃94µg/m³
O₃
Ozone

Hourly forecast Washington (District of Columbia)

Now29°
Partly cloudy
17:0028°
Light drizzle
18:0025°
Moderate rain
19:0027°
Overcast
20:0024°
Slight rain
21:0023°
Heavy rain
22:0023°
Dense drizzle
23:0023°
Slight rain
00:0023°
Light drizzle
01:0023°
Overcast
02:0022°
Moderate rain
03:0023°
Light drizzle
04:0023°
Light drizzle
05:0023°
Overcast
06:0023°
Mostly clear
07:0023°
Mostly clear
08:0025°
Overcast
09:0026°
Mostly clear
10:0027°
Overcast
11:0028°
Overcast
12:0029°
Overcast
13:0029°
Partly cloudy
14:0028°
Overcast
15:0027°
Overcast

Health Recommendations for Washington Residents

Based on current air quality: Good · AQI 27

Good
Air Purifier
Air PurifierTurn Off
Car Filter
Car FilterAdvisable
N95 Mask
N95 MaskAdvisable
Stay Indoor
Stay IndoorAdvisable

UV Index

3.9

Moderate

Use protection if you’re out for extended periods.

Wind

12.8 km/h

Light breeze — leaves rustling gently.

AQI Graph

Historical AQI Data Washington (District of Columbia)

27
Min. AQIat 11:00 AM on 21st Jul
106
Max. AQIat 3:00 PM on 20th Jul
20-07-2026Time21-07-2026

United States Major Cities AQI Overview


Most Polluted Cities by AQI United States

Last Updated: 21 Jul 2026, 15:01

Health Advice For People Living in Washington

0.3
Cigarettes
per day
Weekly2.1 Cigarettes
Monthly9 Cigarettes

Breathing the air in this location is equivalent to smoking 0.3 cigarettes a day.

Disclaimer: This cigarette-equivalent estimate is calculated using the average PM2.5 concentration from the past 24 hours, assuming constant exposure throughout that period.
Solutions for Washington Current AQI (US)
Air Purifier
Air PurifierTurn Off
Car Filter
Car FilterAdvisable
N95 Mask
N95 MaskAdvisable
Stay Indoor
Stay IndoorAdvisable
Must turn on the air purifier to enjoy fresh air.Get an Air Purifier

Prevent Health Problems: Understand Your Risks

Washington · Current air quality: Good · AQI 27

Low Trigger Risk

Headaches

Risk of Headaches symptoms is Low when AQI of Washington is Good (0-50).

Common signs

Some common signs are: Pressure or tightness around the forehead and temples, Sensitivity to light or smell, Fatigue or difficulty concentrating.

Do’s :
  • Choose indoor, clean indoor air when the AQI is elevated.
  • Stay hydrated and take short breaks from devices or harsh light if you are migraine-prone.
  • If you Make use of prescribed migraine meds, Keep close them accessible.
Don’ts :
  • Try not to do intense outdoor exercise during worse AQI periods.
  • Don’t ignore worsening symptoms that feel unusual for you.

Disclaimer: The health risks mentioned above are precautionary recommendations based on current AQI levels. While you may not experience immediate effects, prolonged exposure to air pollution can lead to these health issues over time. This is not medical advice. Please consult a clinician if you experience severe, unusual, or worsening symptoms.

Air Quality FAQs at Washington, District of Columbia

The current real-time AQI (US) level in Washington, District of Columbia is 27 (Good). This was last updated recently.

The best AQI (US) level was generally lower during the early afternoon in the last 24 hours.

The worst AQI (US) level typically peaks during early morning or late evening hours due to temperature inversion.

The AQI (US) levels in Washington, District of Columbia have been fluctuating throughout the last 24 hours depending on traffic and weather conditions.

Current AQI (US) levels are good for everyone. It's advised to adjust your outdoor activities based on personal sensitivity.