OpenWindow

Is it safe to open your windows right now?

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Enter a city to see the result.

AQI-
Atmosphere-
Humidity-

Invest in this project to ensure real-time air data stays free and unbiased for everyone

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How It Works

What standards do you use?

We use the US EPA (Environmental Protection Agency) rules. Think of this like a health grade for the air. Even if the sky looks blue, there might be tiny "dust" called PM2.5 that you can't see. If the air grade (AQI) is above 100, we tell you "NO" to keep that invisible dust out of your home.

How does dirty air affect me over time?

Bad air is like a slow poison. Tiny particles can get deep into your lungs and even your blood. If you breathe this in every day, it can make you feel tired or cause breathing problems later in life. Using this website helps you pick the best times to breathe the cleanest air possible.

Why is "Extreme Weather" bad for my home?

Your home should be your shield. When it is very hot (over 30°C) or very cold, opening a window stresses your body and your house. Extreme heat can even make your furniture and paint release smelly chemicals. We say "NO" during these times to keep your indoor air stable and safe.

Is humidity really a big deal?

Yes! High humidity (over 80%) is like an invitation for mold to grow. Mold loves wet air and can start growing in your walls or carpets in just two days. Once it starts, it's hard to stop and bad for your health. We keep your windows shut until the air is dry enough to be safe.