Worst air pollution Washington State Capitol - Olympia, today and tomorrow
Today (15 July): Air quality in Washington State Capitol is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 AM (O3: 58.7/100).
Tomorrow (16 July 2026): Air quality in Washington State Capitol is poor. AQI worsens to poor; O3 increases to poor; all other pollutants stay as today. Pollution peaks around 4:00 AM (O3: 60.6/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Since Washington State Capitol is a domed capitol set on landscaped grounds above Capitol Lake, its air quality mirrors Olympia overall rather than following a separate local pattern. Local traffic and immediate surroundings can shift day-to-day readings slightly from the citywide figure.
Today - 15 July | Pollution peaks at 06:00
AQI:
Medium
58.7/100
PM2.5 (fine particles):
Good
12.3/100
PM10 (coarse particles):
Good
4.3/100
NO2 (nitrogen dioxide):
Good
11.8/100
O3 (ozone):
Medium
58.7/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.6/100
PM1 (ultrafine particles):
Good
15.3/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 04:00
AQI:
Poor
60.6/100
PM2.5 (fine particles):
Good
11.3/100
PM10 (coarse particles):
Good
3.9/100
NO2 (nitrogen dioxide):
Good
7.5/100
O3 (ozone):
Poor
60.6/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.9/100
PM1 (ultrafine particles):
Good
13.6/100
Other Landmarks in Olympia
Frequently Asked Questions
Is air quality bad in Washington State Capitol right now?
On 15 July 2026, overall air quality in Washington State Capitol is medium. AQI is the main air quality indicator at 58.7/100. Pollution peaks around 6:00 AM (O3: 58.7/100).
Will air quality be worse tomorrow in Washington State Capitol?
On 16 July 2026, air quality conditions in Washington State Capitol will be worse than today, with AQI forecast at poor at 60.6/100. Pollution peaks around 4:00 AM (O3: 60.6/100).
When is air pollution at its worst in Washington State Capitol?
Seasonal changes shape air quality at Washington State Capitol much as they do across Olympia: the wet winter and spring months are generally the cleanest, with regular rain limiting particulate buildup, but late summer wildfire smoke is the biggest concern, sometimes pushing air quality into unhealthy territory for days at a stretch. Coastal areas see relatively little of the smoke that can settle into inland valleys during fire season.
Are air quality levels in Washington State Capitol 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?
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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