Members of RIWA-Meuse monitor water quality in co-operation with the governments at some ten stations along the river.

At the intake points water quality is constantly monitored with both chemical analysis as well as biomonitoring. Also every four weeks samples are taken at all measuring points for analysis of a broad number of substances. Every three years the extend of the number of substances analysed is determined: new relevant substances are added and old substances which are no longer of concern are deleted. Every year new developments in science are used to decide whether to add a not yet monitored substance to the list. Also state of the art analytical techniques are used to screen the presence of a wide scale of substances. With these techniques the focus is on detecting whether a substance is present rather than its exact concentration. This is being done in order to get an early warning if substances are suddenly appearing. Furthermore every now and then monitoring zooms in on a substance of concern which is followed throughout the whole river basin. These type of campaigns have been done in the past on substances like Diuron, Glyphosate and Bromide. Usually these campaigns are performed in cooperation with waterboards in the river basin.