It includes surface water, including rainwater, water from wetlands, rivers and lakes. Water that is naturally occurring water on the Earth’s surface in ice sheets, ice caps, glaciers, icebergs, bogs, ponds, lakes, rivers and streams, and has a low concentration of dissolved solids. This surface water source includes water of a quality generally acceptable for, or requiring minimal treatment to be acceptable for, domestic, municipal or agricultural uses (at least <10,000 mg/l TDS, though a range of additional quality properties may also be considered). ‘High quality’ fresh water sources considered acceptable for potable use are typically characterised as having concentrations of dissolved solids less than 1,000 mg/l.

Source: ESRS E3 Water and marine resources