Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

United Utilities (LSE: UU.L - news ) said on Friday that it is continuing to advise customers in Lancashire to boil their water before use after a routine test at Franklaw water treatment works in Preston (OTC BB: PSNP - news ) found small traces of a microscopic bug in the water.

Answer: product_or_material_produced: water treatment, water