ISO 16075-4:2016 provides recommendations regarding:

· monitoring the quality of treated wastewater (TWW) for irrigation;

· monitoring irrigated plants;

· monitoring the soil with regard to salinity;

· monitoring natural water sources in neighbouring environments;

· monitoring the quality of water in storage reservoirs.

It puts emphasis on sampling methods and their frequency. Regarding the methods of analysis, ISO 16075-4:2016 refers to standard methods or, where not available, to other bibliographical references.