Rate of change in rivers classified as less than good as a percentage of the total river classified. Data shown is for different types of classification scheme, by country
Some countries have more than 1 national classification scheme and so results for each scheme are shown separately e.g. England and Wales has a chemical scheme and a biological scheme. This separation into types of scheme also illustrates that whilst one scheme may show an improvement in quality, another may show a deterioration e.g. The Northern Ireland chemical scheme showed an improvement whilst the biological scheme showed a deterioration.
For references, please go to http://www.eea.europa.eu/data-and-maps/figures/rate-of-change-in-rivers-classified-as-less-than-good-as-a-percentage-of-the-total-river-classified-data-shown-is-for-different-types-of-classification-scheme-by-country or scan the QR code.
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