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The image consists of a line graph titled "River Water Quality in the UK," depicting the percentage of river water with good chemical quality from 1990 to 2002 across four regions: Wales, Northern Ireland, England, and Scotland. In 1990, Wales had 75%, Northern Ireland had 45%, England had 70%, and Scotland had 80%; in 1992, Wales had 75%, Northern Ireland had 45%, England had 65%, and Scotland had 85%; in 1994, Wales had 85%, Northern Ireland had 45%, England had 75%, and Scotland had 90%; in 1996, Wales had 85%, Northern Ireland had 65%, England had 85%, and Scotland had 85%; in 1998, Wales had 90%, Northern Ireland had 45%, England had 85%, and Scotland had 85%; in 2000, Wales had 95%, Northern Ireland had 55%, England had 85%, and Scotland had 85%; in 2002, Wales had 95%, Northern Ireland had 65%, England had 90%, and Scotland had 80%.
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The chart illustrates the proportion of rivers with good chemical quality in four regions of the UK from 1990 to 2002.
Overall, there was a fluctuation in the percentage of good chemical quality in the rivers of England and Scotland, while the statistics for Wales and Northern Ireland showed relative stability during the first eight years.
In detail, the good chemical quality of England’s river water constituted 45 percent in 1990, followed by a sharp rise to reach a peak of nearly 70 percent in 1996. However, it then dropped significantly, ending at 50 percent in 2002. Meanwhile, Scotland’s proportion started at nearly 22 percent, increased to a peak of 60 percent in 2000, and then decreased significantly to 40 percent in the final year.
About 95 percent of Wales’s river water was of good chemical quality in 1990, after which it stabilized at this percentage until 1998, but experienced a considerable decline to 80 percent by 2002. Similarly, the figure for Northern Ireland remained unchanged at 88 percent from 1990 to 1998, but then saw significant growth to around 95 percent in the last four years.
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