"Just look outside" used to be a reasonable way to judge the air. It isn't anymore. Fine particulate pollution and wildfire smoke are often invisible at the concentrations that actually matter for your lungs, and pollen counts swing hard from one day to the next with no visual cue at all. Knowing how to check if it's safe to go outside today means looking at actual data, not the sky.
Why you can't just eyeball it
The particles that drive most air-quality health warnings are small enough to stay invisible well past the point where they're a real problem, particularly for anyone with asthma, COPD, or a heart condition. Wildfire smoke is the extreme version of this -- it can travel hundreds of miles from the actual fire and settle in as a thin haze that barely registers to the eye while still spiking particulate readings.
Understanding the AQI scale
The US Air Quality Index compresses a handful of pollutants into one number from 0 to 500+, split into color-coded bands:
- 0-50 (Good) -- air quality is satisfactory for essentially everyone.
- 51-100 (Moderate) -- acceptable, though an unusually sensitive person might notice mild effects.
- 101-150 (Unhealthy for Sensitive Groups) -- people with respiratory or heart conditions, children, and older adults should start cutting back on prolonged outdoor exertion.
- 151-200 (Unhealthy) -- everyone may begin to notice effects; sensitive groups should limit time outside.
- 201-300 (Very Unhealthy) and 301+ (Hazardous) -- health warnings for the entire population, with outdoor activity discouraged.
Wildfire smoke: the part most air-quality apps miss
A lot of casual weather apps show a general regional AQI without accounting for an active fire nearby that hasn't shown up in the official reading yet. Satellite-based fire detection can flag hotspots close to you even before smoke has visibly rolled in, giving you a head start rather than reacting after the haze arrives.
Pollen: the other invisible trigger
Separate from air pollution, seasonal grass, tree, and weed pollen drives its own set of symptoms for people with allergies or asthma, and it spikes and falls independently of the AQI. A day with "Good" air quality can still be a rough allergy day.
How Are You Safe? puts it all together
Are You Safe?
Checks air quality, wildfire smoke, and pollen for your exact location and gives you one plain-language read before you head outside.
Instead of making you cross-reference three different sources, Are You Safe? pulls air quality, nearby wildfire activity, and pollen levels together into one plain-language check for your location -- no jumping between apps, no decoding raw index numbers. It installs to your phone's home screen so checking before you head out takes a few seconds.
Who should check this daily
People with asthma or COPD, outdoor workers, runners and cyclists, parents of young kids, and older adults tend to feel the effects of poor air quality first and most severely -- if that's you, a quick daily check is worth building into your routine the same way you'd check the weather.
Frequently asked questions
What AQI level is unsafe for kids or people with asthma?
Sensitive groups are generally advised to start limiting outdoor time once AQI passes about 100-101 ("Unhealthy for Sensitive Groups"), while the general population is usually advised to cut back once it passes roughly 150.
Can wildfire smoke affect me if I don't see or smell it?
Yes. Fine smoke particles can be elevated well before it's visually obvious, especially depending on wind direction and how far the smoke has traveled.
Is pollen data accurate for my exact address?
It's based on the nearest regional estimate rather than a hyper-local reading at your exact doorstep, so treat it as a close, useful estimate for planning your day rather than a lab-precise number.
Do I need to create an account to use Are You Safe?
No account is needed -- it includes 250 free checks a month and can be installed to your phone's home screen like an app.
Is Are You Safe? equally accurate everywhere in the world?
The underlying data sources have global coverage, but resolution depends on how many ground monitoring stations and satellite passes cover a given area -- regions with denser monitoring networks, which tends to include much of the US, Europe, and parts of Asia, generally get more precise readings than areas with sparser coverage.