Watertype

Watertype is a general term used to categorize water by its physical and chemical characteristics, source, and intended use. In hydrology, environmental science, and consumer labeling, watertype helps distinguish between water resources and products.

Salinity-based classification is common: freshwater (low mineral content suitable for drinking and most ecosystems), brackish water (intermediate salinity, often found in estuaries), and seawater (high salinity). Some classifications also include hypersaline waters or saline lakes.

Purity and treatment-based watertypes include distilled water (low dissolved solids produced by distillation), deionized or demineralized water, mineral water (naturally occurring or enhanced with minerals), purified water (remediated to meet standards), and potable water (safe for drinking). Industrial contexts may distinguish process water, technical grade water, and wastewater or reclaimed water.

Origin- and source-based watertypes include meteoric water (precipitation-derived), groundwater, surface water (rivers, lakes), and marine water (oceans). Groundwater is often further classified by aquifer type and depth.

In practice, watertype affects treatment requirements, ecological effects, infrastructure design, and regulatory considerations.