Glossary & Lingo

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TOC (Total Organic Carbon)

TOC measures the amount of organic carbon in water.

Total Chlorine

Free chlorine and combined chlorine.

turbidity

The cloudy and opaque appearance of water. It is caused by the presence of suspended and colloidal matter. In the waterworks field, a turbidity measurement is used to indicate the clarity of water. It is measured in NTU (Nephelometric Turbidity Units).

turnover rate

The time between when water enters and leaves a storage structure such as a reservoir.