seawater, saltwater, brine (noun)

water containing salts

"the water in the ocean is all saltwater"

saltwater (Noun)

salt water; brine

saltwater (Adjective)

of, relating to, containing, inhabiting, or used in salt water

Saltwater

"Saltwater" is a song by Chicane featuring the vocals of Irish singer Máire Brennan. The track uses parts of Clannad's 1982 hit "Theme From Harry's Game" with both re-recorded and newly-written lyrics. It was released as a single in 1999, reaching the #6 position on the UK Singles Chart and becoming a popular dance track in clubs across Europe. In 2003 the song was used in a national tourism campaign for Ireland and also by Belfast City Council in adverts promoting the city.

saltwater

Saline water (more commonly known as salt water) is water that contains a high concentration of dissolved salts (mainly sodium chloride). On the United States Geological Survey (USGS) salinity scale, saline water is saltier than brackish water, but less salty than brine. The salt concentration is usually expressed in parts per thousand (permille, ‰) and parts per million (ppm). The USGS salinity scale defines three levels of saline water. The salt concentration in slightly saline water is 1,000 to 3,000 ppm (0.1–0.3%); in moderately saline water is 3,000 to 10,000 ppm (0.3–1%); and in highly saline water is 10,000 to 35,000 ppm (1–3.5%). Seawater has a salinity of roughly 35,000 ppm, equivalent to 35 grams of salt per one liter (or kilogram) of water. The saturation level is only nominally dependent on the temperature of the water. At 20 °C (68 °F) one liter of water can dissolve about 357 grams of salt, a concentration of 26.3% w/w. At boiling (100 °C (212 °F)) the amount that can be dissolved in one liter of water increases to about 391 grams, a concentration of 28.1% w/w.