This paper discusses the changes to the legislation on pollution of the aquatic environment in 2010–2016, including priority and hazardous substances. Both EU regulations (Water Framework Directive 2000/60/EC, Directive 2008/105/EC, Directive 2013/39/EU) and Polish (Journal of Laws Ordinance of 2014 Item 1800) were discussed and evaluated. Additionally, an outlook for further changes concerning pollution of the aquatic environment is given.