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I searched Google only to come up with various results with different views. Is there any official or reliable source that states the impacts of keeping the WiFi router on regarding environmental impact, carbon footprint and personal health impacts?

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    Well, I guess somewhere on your router there's info on how much Watt it "has". Aiming for the worst case: Multiply this number by 24, then by 365 - voila, you know, how many Wh your router guzzles up if it runs 24/7 at full power. The carbon footprint depends on your energy mix. Ask your energy provider, how much CO2 is in a Wh, multiply it with your consumption and there you are. As to personal health... unless you sleep directly on top of the router and/or amplify the signal significantly, there's no harm. – Erik Sep 20 at 13:52
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According to this link, an average router will use 6w. Leaving it on all the time will therefore use approximately 0.14kWh per day - about the same as using a 60W laptop for 2.4 hours, or boiling a kettle once.

While it will make a tiny difference if you turn it off, there are many other things you can do that will save a lot more energy.

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    Indeed. The most energy-intensive things in our daily lives include home heating, home cooling, and transportation (gasoline for cars). – Nayuki Sep 20 at 16:10
  • I've reduced my consumption by a good few tens of watts by looking at little loads, but the router stays on except when I'm on holiday: If I forget just once to turn it on, my desktop draws more power in the time it takes for the router to boot than I'd save in a month (it's not a powerful desktop, but it is a slow router) – Chris H Sep 23 at 15:53

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