Guidelines for treated wastewater use for irrigation projects — Part 4: Monitoring

This document 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, this document refers to standard methods or, where not available, to other bibliographical references.

NOTE       In cases where a monitoring plan already exists, these recommendations can be integrated into this plan. This is notably the case when a broader approach of risk management is implemented, such as the water safety plans (serving as a model for sanitation safety plans) developed by WHO^[16].