Long Barn, California Air Quality
Long Barn air quality today — the AQI, the main pollutant, and whether it’s safe to exercise outside right now
Long Barn, CA · Air quality right now
The air quality index in Long Barn, CA is 165 (Unhealthy) right now — a health concern for everyone.
Is it safe to be outside in Long Barn today?
AQI 165 Limit time outside — Unhealthy
Everyone should cut back on outdoor exertion; an N95 helps.Main pollutant: PM2.5Observed 8:00 AM PDT
Pollutants right now
- PM2.5124 µg/m³Main pollutantfine particles — smoke, exhaust, soot
- PM10126 µg/m³coarse particles — dust, pollen, ash
- Ozone62 µg/m³smog — builds on hot, sunny days
- NO₂21 µg/m³nitrogen dioxide — traffic, combustion
ExerciseCut hard outdoor exercise — shorten it, ease the pace, or train indoors.
Wildfire smoke & fire weather in Long Barn
Smoke checkFine-particle (PM2.5) level right now: 124 µg/m³ Unhealthy 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 Long Barn’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 Long Barn 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 Long Barn
Across the EPA’s county records from 2020 to 2025, Long Barn’s cleanest year was 2022 (median AQI 39) and its most polluted was 2023 (median AQI 43); the typical (median) day has held roughly steady since 2020.
| Year | Median AQI | Unhealthy+ | Main pollutant | USG | Moderate | Good |
|---|---|---|---|---|---|---|
| 2020 | 41 | 0 | Ozone | 5 | 71 | 277 |
| 2021 | 41 | 0 | Ozone | 2 | 63 | 295 |
| 2022 | 39 | 0 | Ozone | 1 | 12 | 237 |
| 2023 | 43 | 0 | Ozone | 2 | 51 | 237 |
| 2024 | 40 | 0 | Ozone | 4 | 64 | 286 |
| 2025 | 39 | 0 | Ozone | 1 | 43 | 294 |
“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
- What was the worst year for air quality in Long Barn?
- In the EPA's 2020–2025 county records, 2020 had the most days above AQI 100: 5 days (5 Unhealthy for Sensitive Groups, 0 Unhealthy or worse). The highest median AQI came in 2023 (43; 2020's was 41).
- How many unhealthy air days does Long Barn have?
- Across 2020–2025, under 1% of the days reported for Long Barn's county had an AQI above 100 (15 of 1945), about 3 days a year. 2025 had 1 day.
- What's the main air pollutant in Long Barn?
- Ozone: it drove Long Barn's county AQI on the most days in every year of the EPA's 2020–2025 records.