The provided chartcompares the percentage of water in UK rivers that was grouped as having good chemical quality from 1990 to 2002. Overall, Wales and Northern Ireland topped the list with small changes among these years. England’s indicators were flactuated. Scotland’s figures increased noticeably by the period.
Focused on Wales, it remained at about 95-98% among years untill 1998, before dicresing slightly at roughly 80 % in 2002. Northern Ireland’s percentages continuously rised untill 1996, from 84% to 89%. and had steady increse in 2000, at about 100%. However, was a small decrease in 2002.
England’s and Scotland’s indicatots always flactuaated among these period. England’s figures reached its peak of 70% in 1996, before declining sligtly to about 30% in 1996. later in 2002 it increased at about 50%. Scotland had no big chages among 6 years from 1990. it incresed reaching a peak of 60% in 2000. however experienced a dicline to about 40% in 2002.