Dayville, Oregon Air Quality
Dayville air quality today — the AQI, the main pollutant, and whether it’s safe to exercise outside right now
Dayville, OR · Air quality right now
The air quality index in Dayville, OR is 178 (Unhealthy) right now — a health concern for everyone.
Is it safe to be outside in Dayville today?
Limit time outside — Unhealthy (AQI 178)
Everyone should cut back on outdoor exertion; an N95 helps.Main pollutant: PM2.5
Pollutants right now
- PM2.543 µg/m³Main pollutantfine particles — smoke, exhaust, soot
- PM1046 µg/m³coarse particles — dust, pollen, ash
- Ozone68 µg/m³smog — builds on hot, sunny days
- NO₂15 µg/m³nitrogen dioxide — traffic, combustion
ExerciseCut hard outdoor exercise — shorten it, ease the pace, or train indoors.
Wildfire smoke & fire weather in Dayville
Smoke checkFine-particle (PM2.5) level right now: 43 µg/m³ Unhealthy for Sensitive Groups on the EPA PM2.5 scale. PM2.5-based; smoke is one possible source — traffic, industry, and dust raise the same number.
Wildfire smoke shows up in air-quality data as fine-particle (PM2.5) pollution — it’s the number that climbs when smoke moves in. A Fire Weather Watch from the National Weather Service means critical fire-weather conditions — dry fuels, low humidity, gusty wind — are possible in the next day or two; a Red Flag Warning means they’re happening or imminent. On smoky days, EPA and AirNow guidance is to limit time outdoors, keep windows closed, run filtration if you have it, and wear an N95 if you must be outside. See where smoke and storms sit right now on the live weather map.
Cleaner-air gear
- Levoit Core 300S True-HEPA Air Purifier
A true-HEPA purifier captures the PM2.5 that drives most bad-air days — wildfire smoke, traffic, smog. Run it in the room you sleep or work in; the air you breathe for hours matters most.
- 3M Aura N95 Respirator Masks (20-pack)
A well-fitted N95 filters the fine particles cloth and surgical masks miss — the right protection for going outdoors on a smoky or Unhealthy-AQI day.
- Temtop M10 Indoor Air Quality Monitor (PM2.5 / AQI)
A handheld PM2.5/AQI monitor tells you whether your indoor air is actually clean — so you know if your purifier is keeping up or if outdoor smoke is leaking in.
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How to read Dayville’s air quality
Air quality is reported as the EPA Air Quality Index (AQI), a 0–500 scale set by whichever pollutant is worst at the moment — where an AQI under 100 is a safe day for outdoor activity in Dayville and above 100 people with asthma, heart conditions, the very young, and older adults should start to scale back.
For the full six-category scale — every band, its color, and the pollutants behind the number — see the AQI scale guide.
Air quality over time in Dayville
Across the EPA’s county records from 2020 to 2025, Dayville’s cleanest year was 2025 (median AQI 37) and its most polluted was 2021 (median AQI 51); the typical (median) day has trended cleaner since 2020.
| Year | Median AQI | Good | Moderate | USG | Unhealthy+ | Main pollutant |
|---|---|---|---|---|---|---|
| 2020 | 44 | 196 | 161 | 1 | 6 | PM2.5 |
| 2021 | 51 | 178 | 177 | 5 | 5 | PM2.5 |
| 2022 | 46 | 198 | 166 | 1 | 0 | PM2.5 |
| 2023 | 44 | 207 | 156 | 2 | 0 | PM2.5 |
| 2024 | 49 | 189 | 158 | 5 | 14 | PM2.5 |
| 2025 | 37 | 230 | 134 | 0 | 0 | PM2.5 |
“USG” is Unhealthy for Sensitive Groups (AQI 101–150); “Unhealthy+” combines the Unhealthy, Very Unhealthy, and Hazardous days. In 2024 the EPA tightened the annual fine-particle (PM2.5) standard to 9 µg/m³ from the previous 12 µg/m³, so counties near the old limit read worse against the new one. Source: EPA AQS annual summaries, 2020–2025.
Frequently asked
- Why is the air quality bad in Dayville today?
- Poor air quality in Dayville is usually driven by one dominant pollutant — most often fine particle pollution (PM2.5) from wildfire smoke, vehicle exhaust, or industry, or ground-level ozone (smog) that builds on hot, sunny, stagnant days. The AQI at the top of this page names which pollutant is highest right now; that pollutant is what's making the air "bad," and weather — heat, calm wind, or smoke blown in from elsewhere — is usually why it spikes on a given day.
- Is it safe to exercise outside in Dayville right now?
- It depends on the AQI. Below 100 (Good or Moderate) it's generally fine to run or work out outdoors. From 101–150 (Unhealthy for Sensitive Groups), people with asthma, heart conditions, kids, and older adults should shorten or move workouts indoors. At 151+ (Unhealthy) everyone should cut back on hard outdoor exertion, because exercise makes you breathe more polluted air deeper into your lungs. The live verdict at the top of this page gives the go/no-go for Dayville right now.
- What's the main pollutant in Dayville's air?
- The two pollutants that most often drive Dayville's AQI are fine particulate matter (PM2.5) and ground-level ozone. PM2.5 tends to dominate in winter, near traffic and industry, and during wildfire smoke events; ozone tends to dominate on hot, sunny summer afternoons. This page identifies the dominant pollutant live — it's the one whose sub-index matches the overall AQI — so you can see which is the problem today rather than guessing by season.
More for Dayville
See the full Dayville, OR weather forecast — hour-by-hour outlook, NOAA radar, satellite, and air quality.