The annual river water quality results for 2009 were published recently by Defra. River water quality is one of the 68 sustainable development indicators and measures biological and chemical river water quality annually. The indicator represents the proportion of river water considered to be of good quality measured in terms of river length.
The main findings suggest that 73% of English rivers surveyed were of good biological quality in 2009 from 72% in 2008. They also suggest that 80% were of good chemical quality from 79% in 2008. It is the fifth consecutive year of improvement in chemical river water quality.
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