Ultraviolet Transmission

UVT - Ultraviolet Transmission

UVT (Ultraviolet transmission) is a water quality parameter. The UVT method measures the amount of UV light at 254 nm, that is a simple ratio of the output light(I₁ from a sample and the input light(Io) and is normally written as a percentage:

UVT = I₁ / Io x 100%

In very clean water such as deionised water the UVT will be 100%, as there is no organic matter to absorb light at 254nm.

In untreated inlet water at a water treatment plant, you would see significant lower UVT value. This corresponds to the amount of treatment required.