In Poland, audits conducted in 2011 and 2014, by the Polish governmental Supreme Audit Office (NIK), reported 15 out of 20 farms in breach of environmental requirements, such as provisions of the Water Resources Act, causing a direct risk of groundwater contamination.
Nutrients in manure runoff from fur factory farms leads to growth of toxic algea in waterways, causing loss of biodiversity and rendering lakes unswimmable. When algae blooms occur, it limits the amount of oxygen for other aquatic species and causes dead zones.
Mink farms are the most likely source of water quality problems in nine Canadian lakes in western Nova Scotia, according to an Acadia University report released by the province’s Environment Department in 2012. According to the report by Mike Brylinsky of the Acadia Centre for Estuarine Research, water quality surveys carried out between 2008 and 2012 showed lakes within the watersheds to be seriously degraded:
“primarily with respect to high nutrient over-enrichment resulting in the development of high algal concentrations.”