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NRW had previously confirmed that seven out of the nine most protected rivers in Wales - known as special area of conservation or SAC rivers - were failing water quality targets due in part to high levels of nutrients.

These include the Pembrokeshire Marine Special Area of Conservation, one of the country's most famous and popular tourist hotspots.

The National Trust manages a special area of conservation in the Mournes, "with the whole site designated specifically because of the habitat that's there", its lead ranger, James Fisher, told BBC News NI.

They also designated about 100 acres on the Longicharo peninsula as a special area for the giraffe.

The River Usk is a designated special area of conservation protected by law, due to its importance for rare wildlife including the Atlantic salmon, which is threatened with extinction from Wales.