In Powys the river lies within the Radnorshire Environmentally Sensitive Area. Much of the lower valley is an Area of Outstanding Natural Beauty. Salmon The Lower Wye has been designated as a salmonid fishery under the EC Freshwater Fish Directive. The Wye was particularly famous for its large "spring" salmon that had spent three or more years at sea before returning to spawn. They used to enter the river between January and June and sometimes reached weights of over , the largest recorded being landed after a long fight by Miss Doreen Davey from the Cowpond Pool at Winforton on 13 March 1923. The last recorded rod-caught salmon from the Wye was taken in 1963 by Donald Parrish and weighed . Since the early 2000s the spring catch has been steadily recovering and salmon of over have been reported every year since 2011. Pollution Pollution has severely affected the river; the Wye does not meet European and national standards on river health. This has been happening for some time; a Nutrient Management Board (NMB) was established in 2014 to address the issues. Pollution from chicken and dairy farms has become so bad the Wye has been used as an example of river pollution in the UK on Countryfile and in several national newspapers. This pollution causes algal blooms several times a year with increasing frequency and length, depleting the oxygen in the water causing fish such as brown trout, chubb and barbel as well as aquatic invertebrates and plants to suffocate to death. Fish and aquatic invertebrates are the main food source for otters, kingfishers, herons, eels and other protected species. Along with many other rivers the Wye is being heavily polluted by manure from the 10 million free range chickens for eggs and meat in intensive poultry units (IPUs) in Powys and Herefordshire, contaminating the Wye's tributaries. As of April 2020, there were over 110 registered IPUs in Powys, each with over 40,000 birds (smaller IPUs need not be registered). In addition, runoff from dairy farms, farm slurry and silage liquor are entering the Wye. A study by the Welsh Government found that only 1% of farm slurry stores in Wales met regulations and that farms were purposely spreading slurry on fields before high rainfall, leading to increased run off into waterways. An investigation by Greenpeace found that Environment Agency staff cuts from austerity had reduced pollution inspections by