Dam Statistics

“Last year the EA blamed a more stringent regime as part of the reason for the poor performance [of water bodies]. The [European] commission has brought in more comprehensive assessments, tougher standards and a one-out-all-out rule which means that, if a water body fails on just one of up to 40 elements, the whole body is categorised as a fail. …
The low compliance rate masks better performance on individual elements. Between 82-88% of all chemical and biological elements are predicted to be at ‘good or better status’ in all river basin districts by 2021.” (http://www.theguardian.com/environment/2016/jan/15/englands-waters-to-remain-illegally-polluted-beyond-2021)

‘One out, all out’ is too harsh. The fish should be fine if only 12-18% toxic indicators are present. Just like cyanide doesn’t kill you unless all other poisons are present.

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