What does phosphates in water mean in practice?
They may come from fertilizers, sewage, detergents or deliberate dosing of corrosion inhibitors in the network.
When does it matter?
They support biological development and compete with arsenic for sorption sites on some media.
Which solutions are related to it?
The source is determined by research; coagulation, sorption, ion exchange or membranes are used depending on the form and purpose.