• The identification of water as a substance

• Properties of water – Physical and chemical properties of pure water
• Electrolysis of water – Electricity-induced chemical reaction
• Water of crystallization – Water molecules present inside crystals
• Dealkalization of water – Removal of alkalinity ions from water
• Drinking water quality standards – Quality parameters set for drinking water
• Portable water purification – Self-contained, easily transported units used to purify water from untreated sources
• Self-ionization of water – Autoprotolysis or exchange of a proton between two water molecules
• Water-in-water emulsion
• Water purification – Process of removing impurities from water
• Water treatment – Process that improves the quality of water
• Water (data page) – Chemical data page for water
• Hard water – Water that has a high mineral content
• Soft water – Water that has a high mineral contentPages displaying short descriptions of redirect targets
  • Water softening – Removing positive ions from hard water
• Water absorption
• Heavy water – Form of water
• Distilled water – Water that has had many of its impurities removed through distillation
• Salinity – Proportion of salt dissolved in water
  • Saline water – Water that contains a high concentration of dissolved salts
  • Seawater – Water from a sea or an ocean
• Hydrate – Substance containing water or its constituent elements
• Boiling – Rapid phase transition from liquid to gas or vapour

• Properties of water – Physical and chemical properties of pure water
  • Color of water – Water color in different conditions
  • Water vapor – Gaseous phase of water
    • Vapour pressure of water – Pressure exerted by molecules of water vapor in gaseous form
    • Steam – Water in the gas phase
  • Ice – Frozen water: the solid state of water
  • Optical properties of water and ice
  • Water quality – Assessment against standards for use
  • Water (data page) – Chemical data page for water
• Mineral water – Drinking water from a mineral spring

• Origin of water on Earth – Hypotheses for the possible sources of the water on Earth
  • Evolution of water on Mars and Earth
• Extraterrestrial liquid water – Liquid water naturally occurring outside Earth
  • Water on terrestrial planets of the Solar System
    • Lunar water – Presence of water on the Moon
    • Water on Mars – Study of past and present water on Mars
  • List of extrasolar candidates for liquid water – Possible existence of liquid water beyond Earth
• Hydrosphere – Total amount of water on a planet
  • Hydrology – Science of the movement, distribution, and quality of water on Earth and other planets
    • Water distribution on Earth – Overview of the distribution of water on planet Earth
  • Water cycle – Continuous movement of water on, above and below the surface of the Earth
  • Groundwater – Water located beneath the ground surface
• Body of water – Any significant accumulation of water, generally on a planet's surface
  • Salt water – Water that contains a high concentration of dissolved salts
    • Seawater – Water from a sea or an ocean
    • Ocean – Salt water covering most of Earth
    • Sea – Large body of salt water
      • Tide – Rise and fall of the sea level under astronomical gravitational influences
    • Brine – Concentrated solution of salt in water
    • Brackish water – Water with salinity between freshwater and seawater
  • Fresh water – Naturally occurring water with low amounts of dissolved salts
    • Aquifer – Underground layer of water-bearing permeable rock
    • River – Natural flowing watercourse
    • Drainage – Removal of water from an area of land
      • Drainage divide – Elevated terrain that separates neighbouring drainage basins
      • Drainage basin – Land area where water converges to a common outlet
    • Lake – Large body of relatively still water
• Glacier – Persistent body of ice that is moving under its own weight
• Geyser – Natural explosive eruption of hot water
• Spring – A point at which water emenges from an aquifer to the surface
• Waterfall – A point in a river or stream where water flows over a vertical drop
  • List of waterfalls – List of notable waterfalls of the world

Weather edit

• Precipitation (meteorology) – Product of the condensation of atmospheric water vapor that falls under gravityPages displaying short descriptions of redirect targets
  • Rain – Precipitation in the form of water droplets
  • Freezing rain – Rain maintained at temperatures below freezing
  • Drizzle – Light liquid precipitation
  • Snow – Precipitation in the form of ice crystal flakes
  • Snow pellets – Precipitation that forms when supercooled droplets of water freeze on a falling snowflakePages displaying short descriptions of redirect targets
  • Snow grains – very small particles of ice, the solid equivalent of drizzlePages displaying wikidata descriptions as a fallback
  • Ice pellets – Precipitation consisting of small, translucent balls of ice
  • Hail – Form of solid precipitation
  • Ice crystals – Water ice in symmetrical shapesPages displaying short descriptions of redirect targets
  • Dew – Water in the form of droplets that appears on thin, exposed objects in the morning or evening
  • Frost – Coating or deposit of ice
    • Hoarfrost – Coating or deposit of icePages displaying short descriptions of redirect targets
  • Atmospheric icing – Weather condition in which water droplets freeze onto objects they come in contact with
  • Glaze ice – Coating of ice on objectsPages displaying short descriptions of redirect targets
• Cloud – Visible mass of liquid droplets or frozen crystals suspended in the atmospheres
• Fog – Atmospheric phenomenon
• Mist – Phenomenon caused by small droplets of water suspended in air
• Spindrift – Spray blown from cresting waves in gales
• Flood – Water overflow submerging usually-dry land
• Wave – Repeated oscillation around equilibrium
  • Wind wave – Surface waves generated by wind on open water
  • Tsunami – Series of water waves caused by the displacement of a large volume of a body of water
• Drought – Period with less precipitation than normal

• Origin of water on Earth – Hypotheses for the possible sources of the water on Earth
  • Evolution of water on Mars and Earth
• Water intoxication – Potentially fatal overhydration
• Drinking water – Water safe for consumption
• Drowning – Respiratory impairment resulting from being in or underneath a liquid
• Dehydration – Deficit of total body water

Marine and aquatic life edit

• Underwater – Aquatic or submarine environment
• Marine biology – Scientific study of organisms that live in the ocean
• Marine life – Organisms that live in salt water
• Hydrobiology – Science of life and life processes in water
  • Aquatic ecosystem – Ecosystem in a body of water

• Human right to water and sanitation – Human right recognized by the United Nations General Assembly in 2010
• Water politics – Politics affected by the availability of water and water resources
  • Water politics in the Middle East
  • Water politics in the Jordan River basin – Political issues arising from or related to the water of the Jordan River
• Water law – Law and regulations that relate to water resourcesPages displaying short descriptions of redirect targets
• Water right – Right of a user to use water from a water source
• Water resources – Sources of water that are potentially useful
  • Water resources of the People's Republic of China – Geography, cleanliness, and access to waterPages displaying short descriptions of redirect targets
  • Water resources of Singapore
• Reuse of water bottles – Waste managementPages displaying short descriptions of redirect targets
• Water crisis (disambiguation) – a type of crises focused on access to waterPages displaying wikidata descriptions as a fallback
  • Water conservation – Policies for sustainable development of water use
    • Water efficiency – gallons per capita per dayPages displaying wikidata descriptions as a fallback
    • Water footprint – Extent of water use in relation to consumption by people
• Water industry – Drinking and wastewater services
  • Water privatization
  • Water management – Sources of water that are potentially usefulPages displaying short descriptions of redirect targets
• Water conflicts – Conflict over an access to water resourcesPages displaying short descriptions of redirect targets
• Water export – Outbound trade involving freshwater
• Water pollution – Contamination of water bodies

Supply and sanitation edit

• Water supply – Provision of water by public utilities, commercial organisations or others
  • Water supply network – System of engineered hydrologic and hydraulic components providing water
    • Reservoir – Storage space for water
    • Dam – Barrier that stops or restricts the flow of surface or underground streams
    • Water tower – Elevated structure supporting a tank
    • Aqueduct – Structure constructed to convey waterPages displaying short descriptions of redirect targets
    • Pump – Device that imparts energy to the fluids by mechanical action
    • Water well – Excavation or structure to provide access to groundwaterPages displaying short descriptions of redirect targets
    • Drinking Fountain – Architecture which pours water into a basin or jets it into the air
    • Water pipe – Systems for conveying fluidsPages displaying short descriptions of redirect targets
      • Plumbing – Systems for conveying fluids
    • Tap (valve) – Valve controlling the release of a liquid or gas
• Sanitation – Public health conditions related to clean water and proper excreta and sewage disposal
• Drinking water – Water safe for consumption
• Water fluoridation – Addition of fluoride to a water supply to reduce tooth decay
  • Opposition to water fluoridation – Overview of the debate over the anti-tooth decay measurePages displaying short descriptions of redirect targets

• Water deity – Water deities around the worldPages displaying short descriptions of redirect targets
• Water (classical element) – One of four primary substances in antiquity
• Holy water – Water blessed by a religious figure
• Adam's ale – Colloquial allusion to water
• Water sports )
  • List of water sports
    • Swimming – Water-based sport
    • Water polo – Competitive team sport played in water
  • Underwater sports – Competitive underwater recreational activities
• Winter sports – Sports or recreational activities which are played on snow or ice
• Water gun – Type of toy gun designed to shoot water
• Water fight – A type of mock combat
• Fountain – Architecture which pours water into a basin or jets it into the air
• Underwater diving – Descending below the surface of the water to interact with the environment

• Bathing – Washing or immersing the body with water
  • Sink – Bowl-shaped plumbing fixture
  • Bathtub – Large container for holding water in which a person may bathe
  • Shower – Place in which a person bathes under a spray of water
• Drinking – Ingestion of water or other liquids
  • Drinking water – Water safe for consumption
  • Tap water – Water supplied through a pipe and tap combination
  • Bottled water – Water sold as a bottled product
  • Drinking vessel
    • Glass (drinkware)
• Use of water in fire fighting – Actions to prevent damage from firePages displaying short descriptions of redirect targets
• Irrigation – Agricultural artificial application of water to land
• Professional diving – Underwater diving where divers are paid for their work
• Naval warfare – Combat involving sea-going ships
• Washing – Method of cleaning
  • Pressure washing – Use of high-pressure water jet for cleaning hard surfaces
• Water transport – Transport of people or goods via waterwaysPages displaying short descriptions of redirect targets
• Water clock – Time-piece in which time is measured by the flow of liquid into or out of a vessel
• Water-based sources of power
  • Water wheel – Machine for converting the energy of flowing or falling water into useful forms of power
  • Hydroelectricity – Electricity generated by hydropower
  • Hydropower – Power generation via movement of water
  • Marine current power – Extraction of power from ocean currents
  • Marine energy – Energy stored in the waters of oceans
  • Osmotic power – Energy available from the difference in the salt concentration between seawater and river water
  • Tidal power – Technology to convert the energy from tides into useful forms of power
  • Wave power – Transport of energy by wind waves, and the capture of that energy to do useful work
    • Water turbine – Type of turbine
    • Steam engine – Engine that uses steam to perform mechanical work
    • Tidal stream generator – Type of tidal power generation technology

• Hydrological Ensemble Prediction Experiment

• OECD Water statistics
• The World's Water Data Page
• FAO Comprehensive Water Database, AQUASTAT
• The Water Conflict Chronology: Water Conflict Database
• US Geological Survey Water for Schools information
• Portal to The World Bank's strategy, work and associated publications on water resources
• America Water Resources Association
• America Water Resources Association
• Water structure and science