What does E. coli in water mean in practice?
Its presence cannot be recognized by appearance, taste or smell; requires a properly collected sample and examination.
When does it matter?
A positive result means that the water should not be considered safe to drink without corrective action and confirmation of effectiveness.
Which solutions are related to it?
Exposure must be interrupted, contamination route found, disinfection performed and re-testing; UV constant does not replace the removal of the cause.