Pesticides

Pesticides are the active substances used in plant protection products and biocides. They are toxic in especially to plants (herbicides), insects (insecticides) or fungi (fungicides).

Plant protection products and biocides are discharged into rivers and streams primarily via diffuse sources (such as leaching from agricultural land, leaching from house-painting).

Inputs of plant protection products and biocides into rivers and streams occur primarily from diffuse sources (e.g. discharges from agricultural land, leaching from building paints).

Thirty (30) of the 61 pesticides regulated by the German Surface Water Ordinance which are used in plant protection agents and biocides complied with the environmental quality standards for the period 2014-2016 at the monitoring sites of the German Working Group on water issues of the Laender and the Federal Government (LAWA ).

For a further 13 substances a check for compliance with environmental quality standards is not always possible since the limit of quantification is higher than the environmental quality standard. The following substances showed exceedences of the environmental quality standard: Imidacloprid, nicosulfuron, cypermethrin, flufenacet, diflufenican, bentazon, dichlorvos, triclosan, 2,4-D, cybutryne, isoproturon, metolachlor, terbutryn, bifenox, diuron, mecoprop and pyrazone (chloridazone) (in descending order of the number of monitoring sites where levels were exceeded).

 

Comparison of annual means/maximum in 2014-2016 with the environmental quality standard
Comparison of annual means/maximum in 2014-2016 with the environmental quality standard
Source: Federal Environment Agency uqn_psm_2014_2016_englisch.pdf