The line graph depicts the proportion of high-quality river water in the UK throughout the period of 12 years, starting from 1990 in percentagewise.
Overall, it is rational that the majority of categories underwent an upward trend, with the exception of Wales. Noticeably, Wales held the dominant position for most of the period.
Regarding the information pertaining to the chart, Wales was considered as the country having the most hygienic river water among four nations, with a far more than 90% at the beginning of the period. In the next eight years, Wales and Northern Ireland hold an identical pattern, with the former reaching a plateau of approximately 95% while the latter stabilizing at around 85%. Further to this, 1998 to 2002 witnessed a gentle fall of roughly 15% in the percentage of Wales water river categorized as having chemical of good quality. On the contrary, the proportion of Northern Ireland’s fresh water river superseded the figure for Wales by 2000, before peaking at nearly 95% at the end of the period.
Concerning to the remaining dataset, in 1990, the quality of water in Scotland, which stood at more than 20%, was classified as the leasft purified among British countries. Turning to other category, there was a ceaseless growth in the percentage of England’s water river that is allocated as having first rate chemical condition. Afterwards, it reached a peak of 70% in 1996 before hitting the trough of 30% in two years later. Interestingly, the proportion of Scotland’s purified water river, despite eclipsing that of England before 1998, hit a low ofat around 45% at the end of the period.