The graph below shows the percentage of river water in the UK that is of good chemical quality, in the period between 1990 and 2002.

The line graph provides

the

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information about how much

percentage

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of river

water

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quality

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in 4 countries : Wales, Northern Ireland,

England

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and

Scotland

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.

Overall

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,

While

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the ratio of river

water

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quality

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in Northern Ireland,

England

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and

Scotland

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witnessed an increase in

quality

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, there was a decrease in

water

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quality

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in Wales The

percentage

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of

water

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quality

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in Northern Ireland remained stable at 85%

during

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for

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8 years and

then

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increased moderately to 95% in 2000 and

then

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stayed constant

to

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until

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2002. In 1990, the

percentage

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of

water

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quality

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in

Scotland

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and

England

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was roughly 20% and 45% respectively . The

percentage

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of

water

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quality

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in

Scotland

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increased sharply to 60% in 2000

then

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went down to 40% in 2002.

on the other hand

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,

England

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saw an increase in the ratio of

water

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quality

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in 1996 with 70%,

then

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collapsed to 30% and increased considerably to 50%

Whereas

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,

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the

percentage

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of

water

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quality

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in Wales was 95% in 1990,

then

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it remained stable over the period of 8 years,

then

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decreased sharply to 80% in 2002