What UV Index Is Best for Tanning Without Burning?
You can tan from a UV index of about 3 and up, and UV 3 to 5 has the lowest burn risk. But every sun tan is UV damage, and burn speed depends on your skin type.
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Guides on the UV index, air quality, and staying healthy outdoors.
Air QualityLatest
US AQI vs. EU Air Quality Index: What's the Difference?
The US AQI is a 0 to 500 number covering six pollutants; the European index is a named band from Good to Extremely poor covering five. Same air, different labels.
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