The image depicts the percentage of good quality river water from 1990 to 2002 in Wales, Northern Ireland, England, Scotland. Wales: consistently 95% (1990-2002), Northern Ireland: 70% (1990-1994), 82% (1996), decline to 60% (1998), increase to 98% (2000), drop to 94% (2002), England: gradual increase from 30% (1990) to 55% (1998), slight fall to 51% (2000), rise to 72% (2002), Scotland: minimal fluctuation, 90% to 93% throughout 1990-2002.
The provided charts illustrate the proportion of river water classified as having good chemical quality across the United Kingdom over the period spanning from 1990 to 2002.
Overall, while the percentage of good quality river water exhibited slight variations in different regions, Wales maintained a consistently high level, whereas England displayed the most significant increase throughout the years.
In Wales, the percentage of river water classified as having good chemical quality remained impressively stable at 95% over the entire period from 1990 to 2002. Conversely, Northern Ireland exhibited more pronounced fluctuations; starting at 70% in 1990, there was an increase to 82% by 1996, followed by a decline to 60% in 1998. However, Northern Ireland experienced a remarkable recovery, peaking at 98% in 2000, before settling at 94% in 2002. In stark contrast, England’s river water quality began at a low base of 30% in 1990, gradually improving to 55% by 1998, with a minor decrease to 51% in 2000.
Scotland’s river water quality showed minimal fluctuations, hovering between 90% and 93% throughout the entire period, indicating a relatively stable status. In 2002, England reached a higher percentage than in previous years, finally achieving 72%. This upward trend demonstrates significant improvement within England compared to earlier years. Thus, while Wales was consistently high and Scotland stable, Northern Ireland experienced the most volatility, and England gradually improved, reflecting distinct patterns in chemical quality among the regions.