These Regulations amend the European Communities Environmental Objectives (Surface Waters) Regulations 2009 so as to: clarify the role of public authorities in the protection of surface waters; include standards for the priority hazardous substances mercury, hexachlorobutadiene and hexachlorobenzene in biota found in surface water bodies; set limits for the priority substance Trifluralin in surface water bodies. They also revoke the European Communities (Quality of Water intended for Human Consumption) Regulations 1989 and set dates for in which a specified programme and a specified inventory must be established.