Worst air pollution Ephrata, today and tomorrow
Today (9 August): Air quality in Ephrata is fair. PM2.5, PM10, and O3 are fair; AQI and NO2 are medium; SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (NO2: 43.0/100).
Tomorrow (10 August 2026): Air quality in Ephrata is fair. PM2.5 decreases to good; PM10 decreases to good; all other pollutants stay as today. Pollution peaks around 10:00 PM (NO2: 40.2/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Ephrata experiences air quality conditions shaped chiefly by dry central Washington high-desert air, and windy spring days can raise dust across the open basin. None of these influences are extreme on their own, but together they shape the local pattern in Ephrata. Short-term spikes are still possible even during the generally cleaner stretches of the year.
Today - 9 August | Pollution peaks at 13:00
AQI:
Medium
43.0/100
PM2.5 (fine particles):
Fair
27.0/100
PM10 (coarse particles):
Fair
21.3/100
NO2 (nitrogen dioxide):
Medium
43.0/100
O3 (ozone):
Fair
38.0/100
SO2 (sulfur dioxide):
Good
8.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.2/100
PM1 (ultrafine particles):
Good
15.7/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 22:00
AQI:
Medium
40.2/100
PM2.5 (fine particles):
Good
19.2/100
PM10 (coarse particles):
Good
13.8/100
NO2 (nitrogen dioxide):
Medium
40.2/100
O3 (ozone):
Fair
27.3/100
SO2 (sulfur dioxide):
Good
10.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.9/100
PM1 (ultrafine particles):
Good
11.4/100
Pollen forecast in Ephrata
View pollen forecastFrequently Asked Questions
Is air quality bad in Ephrata right now?
On 9 August 2026, overall air quality in Ephrata is fair. O3 is the main pollutant at 38.0/100. Pollution peaks around 1:00 PM (NO2: 43.0/100).
Will air quality be worse tomorrow in Ephrata?
On 10 August 2026, air quality conditions in Ephrata will be similar to today, with O3 forecast at fair at 27.3/100. Pollution peaks around 10:00 PM (NO2: 40.2/100).
When is air pollution at its worst in Ephrata?
Seasonal changes shape air quality across Ephrata: winter and spring bring the cleanest air, as frequent rain and consistent onshore wind clear pollution quickly, but August and September wildfire smoke can dominate the season, occasionally driving particulate levels sharply higher for several days. Winter temperature inversions can briefly trap wood-smoke in low-lying valleys, but these episodes are usually short-lived.
Are air quality levels in Ephrata 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
Want to see air quality forecasts for other cities in United States?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Get the full experience in the Airmine app.