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.
Analyze the relationship between 'water treatment' and 'water' within the context of the input sentence.
Options: platform, director/manager, product/material produced, currency