Last update: 12 December 2019

In order to come to a harmonised use of processing factors for the estimation of dietary intakes of pesticide residues found in enforcement and monitoring programmes and by producers, a list of processing factors has been put together for priority substances as defined by the Netherlands Food and Consumer Product Safety Authority (NVWA) and the Dutch Productboard for Horticulture (Productschap Tuinbouw) in 2011.

The list that is made available on this site has been endorsed by the Ministries of VWS (1) and EL&I (1) in December 2011 as the current default in the Netherlands. Adaptations of this list will first be discussed in the pesticide residue consultation group (2). Upon agreement in this group, the changes will be implemented in the list. It is therefore pivotal to always use the latest version from the RIVMNational Institute for Public Health and the Environment website (

In 2019 the pesticide residue consultation group decided to use the PRIMo rev 3.1 model for dietary intake. The commodities listed in the Dutch processing database were adapted to match with this PRIMo rev 3.1 model.

Processing factors have been obtained from EFSA reviews, EFSA opinions, JMPR reports and JMPR evaluations. The overview of the processing factors is listed in an Excel spreadsheet on this site (Overview processing factors.xls (in zip file)) and represents the situation of 12 December 2019, based on information on Pesticide Web, the EFSA website and the JMPR website. The rationale behind the current list of processing factors is presented in the document Rationale processing factors.pdf  on this site. Only the processing factors for cooked polished rice were changed to those for raw polished rice. No update has taken place since March 20, 2018.

(1) VWS: Public Health, Welfare and Sport; EL&I: Economic Affairs, Agriculture and Innovation

(2) this group is formed by representatives from the Ministry of VWS, the Netherlands Food and Consumer Product Safety Authority (NVWA), the Board for the Authorisation of Plant Protection Products and Biocides (Ctgb), the National Institute for Public Health and the Environment (RIVM) and the Fresh Produce Centre (Groente Fruit Huis).

Any questions related to the list of  processing factors can be send to the following  email address: