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Active Weather Warnings

Air Quality Alert

Weather in Pasco, Washington

02:20 PM

Now

84° F

Feels Like 82°

Precipitation 51 %

Wind 6 mph

UV Index (0 - 11+) 2

Humidity 31 %

Today

Day 90°

Night 63°

Precipitation 49 %

Wind 4 mph

UV Index (0 - 11+) 7

Pasco Weather Forecast Updated

9 minutes ago

Last updated on July 20, 2026 at 2:11 PM

Air Quality in Pasco

NOW

71 AQI

Moderate air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 21.63 µg/m³

PM₁₀ 22.34 µg/m³

O₃ 0.046 ppm

NO₂ 2.6 ppb

SO₂ 0.3 ppb

CO 0.16 ppm

NH₃ 3.86 µg/m³

NO 0.13 µg/m³

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

NH₃ – Ammonia

NO – Nitric oxide

Health Recommendations:

Air quality is acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 21.63 µg/m³

PM₁₀ – 22.34 µg/m³

O₃ – 89.99 µg/m³

NO₂ – 4.93 µg/m³

SO₂ – 0.79 µg/m³

CO – 185.83 µg/m³

NH₃ – 3.86 µg/m³

NO – 0.13 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Pasco

Air Quality Alert

Air Quality Alert issued July 20 at 1:46PM PDT by NWS Pendleton OR

Jul 20, 1:46 PM → Jul 22, 9:00 AM

The Washington State Department of Ecology and/or the Yakima
Regional Clean Air Agency has issued an Air Quality Alert until 9 AM
PDT Wednesday.

For the Smoke Air Quality Alert, wildfires burning in the region
combined with forecasted conditions will cause air quality to reach
unhealthy levels.

Pollutants in smoke can cause burning eyes, runny nose, aggravate
heart and lung diseases, and aggravate other serious health
problems. Limit outdoor activities and keep children indoors if it
is smoky. Please follow medical advice if you have a heart or lung
condition.

Information about air quality from the Washington Department of
Ecology Web site is available at http://www.ecy.wa.gov/air.html or
call 360-407-6000.Information about air quality is on the Yakima
Regional Clean Air Agency Web site at http://www.yakimacleanair.org
or call 509-834-2050.

Updated: Jul 20, 2:11 PM Source: NWS Alert