Ozone has a very distinct smell that's often described as pungent, metallic, or like chlorine bleach. Some people also liken it to the scent of a burning wire, electrical sparks, or a "clean" smell. While the smell of ozone is noticeable to many people at concentrations as low as 0.1 ppm, the ability to detect it varies from person to person.
Here are some common descriptions of the ozone smell:
- Pungent: This refers to a sharp, strong, and sometimes unpleasant smell.
- Metallic: Ozone can have a slightly metallic smell, similar to that of iron or steel.
- Chlorine bleach: The most common analogy for the smell of ozone is chlorine bleach, as they share a similar pungent and sharp aroma.
- Burning wire: Some people describe the smell of ozone as resembling the scent of a burning electrical wire.
- Electrical spark: The smell of ozone can also be associated with the smell produced after an electrical spark.
- Sweet and pungent: This combination describes the smell of ozone as being both sweet and sharp, a somewhat contrasting scent.
It's important to note that while the smell of ozone may indicate a high concentration, a lack of odor doesn't necessarily mean it's safe. Ozone can actually deaden your sense of smell, making it difficult to detect even high concentrations.