What is the air quality in Olympia WA?

Olympia WA, United States of America has an annual US AQI of 38 (Reasonable) and average PM2.5 of 6.7 µg/m³, ranking #208 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Olympia WA?

June is typically the cleanest month (AQI 32) and November the most polluted (AQI 48).

Where does Olympia WA's air quality data come from?

PM2.5: 1998–2026 (monitors 1999–2009, 2011–2014, 2016–2018, 2020–2026, satellite 1998, 2010, 2014–2015, 2019; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

Olympia WA, United States of America — Air Quality & Clean City Guide 2026

Olympia WA Air Quality Data

Global rank	City	Continent	AQI	PM2.5
208	Olympia WA, United States of America	North America	AQI 38	PM2.5 6.7 µg/m³