The simple answer is: no, it’s most likely not. To date, several studies have been conducted each finding something different. The studies have produced a jumble of contradictory evidence that leads to no definitive conclusion.
Wi-Fi is a type of radio wave for internet connectivity that some people believe may be detrimental to our health. Electromagnetic sensitivity has been associated with a wide range of symptoms including insomnia, headaches, fatigue, poor concentration, an irregular heartbeat, and dizziness. Research has not yet been able to establish that electromagnetic fields (EMFs) cause these symptoms.
It wasn’t until several cases of cancer developed amongst people working around radioactive materials like Uranium that a connection between the two was formed. Jump ahead to the 20th and 21st century and our concerns are now a bit broader. People express concern over anything that emits any form of radiation. Such concerns include: the sun, the microwave, cell phones, and even Wi-Fi access points.
It is important to understand that there are two types of radiation.
Ionizing radiation is the type of radiation that can poison and kill you. It ionizes the atoms inside of you and breaks their bonds. This is what happens with unstable isotopes like Uranium 235. However, not all exposure to ionizing radiation is necessarily dangerous as long as exposure is kept to a minimum. That’s how X-rays are made possible!
The other type of radiation is non-ionizing radiation. This type of radiation emits electromagnetic (EM) waves at varying wavelengths but does not quite reach the danger level of gamma/ultraviolet rays. This is the type of radiation produced by computers, cell phones, and Wi-Fi routers. In fact, more things emit this type of radiation than you may realize. Light bulbs, satellites, and every radio station within range are a part of this radiation network.
Why is non-ionizing radiation believed to be safe? The larger wavelengths are too large to rupture our atoms and the low amount of power they possess makes them too weak to emit significant amounts of heat.
If you’re comfortable enough to be around electrical lighting, being surrounded by Wi-Fi isn’t all that different. They all emit the same stuff, just with different properties.
Hopefully this helped clear up some of the confusion you may have had. If you’re still curious, I encourage you to read some of the scientific studies available online. Interpret the data and draw your own conclusion.