Manganese is a mineral that naturally occurs in rocks /soil and it is found in iron-bearing waters but is more rare than iron. When manganese is present in water it produces extremely objectionable stains on everything with which it comes in contact and deposits collect in pipelines tap water containing black sediment and turbidity due to precipitated manganese. When fabrics are washed in manganese-bearing water dark brown or black stains are formed due to the oxidation of the manganese. The International Drinking Water Regulations recommend a limit of 0.05 mg/l manganese and industrial purposes the manganese content should not exceed 0.01 to 0.02 mg/l. Therefore monitoring of Manganese is mandatory in drinking water and our Manganese water test is one of its kinds and works on the simple Colour Comparison principle.