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The approximate relationship between Total Dissolved Solids (TDS) and Electrical Conductivity (EC) of waters having EC less than 5 dS/m is expressed a
Question

The approximate relationship between Total Dissolved Solids (TDS) and Electrical Conductivity (EC) of waters having EC less than 5 dS/m is expressed as:

A.

TDS (mg/L) = 425 × EC (ds/m)

B.

TDS (mg/L) = 515 × EC (ds/m)

C.

TDS (mg/L) = 640 × EC (ds/m)

D.

TDS (mg/L) = 720 × EC (ds/m)

Correct option is C


For waters with EC less than 5 dS/m, the relationship is generally TDS = 640 × EC (ds/m), derived empirically.

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