What is the air quality in Longview WA?

Longview WA, United States of America has an annual US AQI of 37 (Reasonable) and average PM2.5 of 5.8 µg/m³, ranking #172 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Longview WA?

July is typically the cleanest month (AQI 31) and November the most polluted (AQI 47).

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

PM2.5: 1998–2024, 2026 (monitors 2004, 2006–2024, 2026, satellite 1998–2003, 2005; 2026 provisional (AirNow)). Measured by government monitoring stations. Full sources are on the methodology page.

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

Longview WA Air Quality Data

Global rank	City	Continent	AQI	PM2.5
172	Longview WA, United States of America	North America	AQI 37	PM2.5 5.8 µg/m³