Division Selection of quality elements

Surveillance monitoring shall be carried out for each monitoring site for a period of one year during the period covered by a river basin management plan for:

• parameters indicative of all biological quality elements,

• parameters indicative of all hydromorphological quality elements,

• parameters indicative of all general physico-chemical quality elements,

• priority list pollutants which are discharged into the river basin or sub-basin, and

• other pollutants discharged in significant quantities in the river basin or sub-basin,

unless the previous surveillance monitoring exercise showed that the body concerned reached good status and there is no evidence from the review of impact of human activity in Annex II that the impacts on the body have changed. In these cases, surveillance monitoring shall be carried out once every three river basin management plans.