The Screening Programme 2021 was carried out by the Norwegian Institute for Water Research (NIVA) and NILU-Norwegian Institute for Air Research. The spotlight was placed on the occurrence and possible environmental problems of 218 chemicals. The selected substances may be included in numerous products and their usage patterns are not easily defined so an array of different locations and sample-types were investigated. The total number of results exceeds 26 000. Results are can be downloaded from the database Vannmiljø.