Worst air pollution Renton, today and tomorrow
Today (15 July): Air quality in Renton is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 52.9/100).
Tomorrow (16 July 2026): Air quality in Renton is fair. All pollutants stay as today. Pollution peaks around 4:00 AM (O3: 51.8/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Renton's air quality reflects the south Lake Washington position in the greater Seattle metropolitan area, with vehicle emissions from I-405 and the Boeing Renton aircraft manufacturing plant generating industrial and test flight emissions alongside concentrated commuter traffic. The Cedar River valley and Lake Washington provide some ventilation, while summer wildfire smoke from Pacific Northwest forests is an increasingly severe seasonal concern.
Today - 15 July | Pollution peaks at 07:00
AQI:
Medium
52.9/100
PM2.5 (fine particles):
Good
14.1/100
PM10 (coarse particles):
Good
5.1/100
NO2 (nitrogen dioxide):
Fair
32.7/100
O3 (ozone):
Medium
52.9/100
SO2 (sulfur dioxide):
Good
1.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.5/100
PM1 (ultrafine particles):
Good
17.4/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 04:00
AQI:
Medium
51.8/100
PM2.5 (fine particles):
Good
12.0/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Fair
24.5/100
O3 (ozone):
Medium
51.8/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.5/100
PM1 (ultrafine particles):
Good
14.7/100
Pollen forecast in Renton
View pollen forecastFrequently Asked Questions
Is air quality bad in Renton right now?
On 15 July 2026, overall air quality in Renton is fair. NO2 is the main pollutant at 32.7/100. Pollution peaks around 7:00 AM (O3: 52.9/100).
Will air quality be worse tomorrow in Renton?
On 16 July 2026, air quality conditions in Renton will be similar to today, with NO2 forecast at fair at 24.5/100. Pollution peaks around 4:00 AM (O3: 51.8/100).
When is air pollution at its worst in Renton?
Renton experiences a distinct seasonal swing in air quality — winter and spring bring the cleanest air, as frequent rain and consistent onshore wind clear pollution quickly, whereas late summer wildfire smoke is the biggest concern, sometimes pushing air quality into unhealthy territory for days at a stretch. Prevailing onshore winds usually keep pollution moving rather than letting it settle.
Are air quality levels in Renton based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app