Worst air pollution Longview, today and tomorrow
Today (15 July): Air quality in Longview is medium. AQI, NO2, and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 AM (O3: 44.3/100).
Tomorrow (16 July 2026): Air quality in Longview is fair. AQI worsens to fair; NO2 increases to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 AM (O3: 38.9/100). 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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Longview's air quality in Washington State reflects the lower Columbia River valley position near the Oregon border, with the Weyerhaeuser and International Paper industrial forest operations and the Port of Longview generating elevated PM2.5 and NOₓ alongside vehicle traffic on SR-432. The Columbia River estuary provides ventilation, while the surrounding Cascades and Coast Range hills create topographic variation and summer wildfire smoke from Pacific Northwest forests is an increasingly severe seasonal concern.
Today - 15 July | Pollution peaks at 06:00
AQI:
Medium
44.3/100
PM2.5 (fine particles):
Good
8.8/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Medium
44.0/100
O3 (ozone):
Medium
44.3/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.6/100
PM1 (ultrafine particles):
Good
9.8/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 04:00
AQI:
Fair
38.9/100
PM2.5 (fine particles):
Good
9.2/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Fair
25.3/100
O3 (ozone):
Fair
38.9/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.2/100
PM1 (ultrafine particles):
Good
9.2/100
Pollen forecast in Longview
View pollen forecastFrequently Asked Questions
Is air quality bad in Longview right now?
On 15 July 2026, overall air quality in Longview is medium. AQI is the main air quality indicator at 44.3/100. Pollution peaks around 6:00 AM (O3: 44.3/100).
Will air quality be worse tomorrow in Longview?
On 16 July 2026, air quality conditions in Longview will be worse than today, with AQI forecast at fair at 38.9/100. Pollution peaks around 4:00 AM (O3: 38.9/100).
When is air pollution at its worst in Longview?
Air quality in Longview shifts across the year, as winter and spring bring the cleanest air, as frequent rain and consistent onshore wind clear pollution quickly; by contrast, by late summer, wildfire smoke can override the region's usual clean-air advantage for days at a time. Prevailing onshore winds usually keep pollution moving rather than letting it settle.
Are air quality levels in Longview 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.
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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