PLEASE NOTE: This dataset has been retired and superceded by the following record https://environment.data.gov.uk/dataset/d8421893-ff04-492c-8d29-caa89f17397e. Chemical status is assessed from compliance with environmental standards for chemicals that are defined as priority substances and/or priority hazardous substances. Chemical status is recorded as ‘good’ or ‘fail’. Chemical status for a water body is determined by the worst scoring chemical (one-out-all-out approach). Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved.