What are the units for UV dose?

The units for UV dose are measured in millijoules per square centimeter. This unit represents the amount of energy delivered by UV radiation to a specific area, which is crucial in determining the effectiveness of UV light in inactivating pathogens in water treatment processes. This measurement helps professionals ensure that adequate exposure levels are achieved for disinfection, allowing for optimal treatment of water to meet health and safety standards.

The energy delivered (in joules) is integrated over the surface area (in square centimeters), giving a clear indication of both the intensity and uniformity of UV exposure over a given surface, which is essential in evaluating the performance of UV disinfection systems. Other measures like milligrams per liter or parts per million do not apply to energy delivery and are instead used for concentration measurements of various substances in fluids. Micrograms per cubic meter, while also a concentration measure, is not relevant in the context of UV dose.