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.
Utilize the input text as a context reference, choose the right relationship between 'water treatment' and 'water' from the options.
Options: director/manager, product/material produced, platform, currency