UV254 is a valuable measurement parameter used to assess water quality and monitor organic contamination. It refers to the ultraviolet transmittance or absorption at a wavelength of 254 nanometres. This measurement is indicative of the presence and concentration of organic compounds in water.

Our probes and controllers can be used to produce various parameters. Using calibration and correlation UV254 can be extrapolated to give surrogate values of common lab tests. Some of these parameters take hours, even days, to get results using laboratory methods, once our controller is calibrated these results can be produced instantly, completely reagent free with zero cost. UV254 is often used as a surrogate parameter for other important water quality parameters. Some commonly used surrogate parameters are stated below.

By utilizing UV254 as a surrogate parameter, water quality monitoring becomes more efficient and cost-effective. It provides a comprehensive assessment of organic contamination and allows operators to make informed decisions regarding treatment processes, pollution events, and overall water quality management.

The potential for UV254 measurement is not limited to a standalone indication of organics in water but serves as a versatile parameter that acts as a surrogate for other important water quality parameters. Its use enables efficient monitoring and management of water resources, ensuring the protection of both human health and the environment.

Select the parameter to find out more:


Biological Oxygen Demand (BOD)

Chemical Oxygen Demand (COD)

Dissolved Oxygen Content (DOC)

Total Organic Content (TOC)

Total Suspended Solids


Lisburn BT28 2GN, GB

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Photonic Measurements is:
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