W85-W99: Exposure to electric current, radiation and extreme ambient air temperature and pressure

W90: Exposure to other nonionizing radiation

Exposure to nonionizing radiation includes a broad range of health conditions caused by exposure to forms of radiation that do not carry enough energy to completely remove tightly bound electrons from their atoms or molecules. These forms of radiation, which include radio waves, microwaves, infrared radiation, and visible light, can be emitted from various sources such as household electrical appliances, cellular phones, Wi-Fi routers, and power lines. When a person is exposed to such radiations excessively, it may result in physiological changes like heat injuries, burns, changes in cell growth, or circadian rhythm disturbances. Symptoms can range from minimal to grievous, depending on the type, intensity, duration, and frequency of exposure. Despite the nonionizing nature of this radiation, repeated or prolonged exposure can lead to significant health concerns.