This Best Practice Guide on the Control of Iron and Manganese in Water Supply is one of a series produced by the International Water Association‎'‎s Specialist Group on Metals and Related Substances in Drinking Water‎.‎ Iron and manganese are often found in soft upland water sources associated with natural organic matter and are also commonly found in the groundwater abstracted from confined and unconfined aquifers‎.‎ The presence of iron and manganese in water is one of the most frequent reasons for customers‎'‎ complaint due to aesthetic issues ‎(‎yellow‎,‎ brown and black or stains on laundry and plumbing fixtures‎)‎‎.‎ These two metals can be removed fairly readily by physico‎-chemical treatment‎.‎ The municipal treatment systems deployed derive benefit from their larger scale‎,‎ particularly in relation to control‎,‎ but the processes used are less suitable for the numerous small supplies that are the most common water supplies throughout Europe‎,‎ especially in rural areas‎.‎ One important source of iron in drinking water is from old corroded cas‎.‎‎.‎‎.‎