The phrase "almost exclusively water" is correct and usable in written English.
It can be used to describe something that is primarily made up of water, with only a small amount of other substances present.
Example: "The solution was almost exclusively water, making it ideal for the experiment."
Alternatives: "primarily water" or "mostly water".
In terms of coverage, it varies enormously between season and at different areas, for example, most households in Nsukka rely almost exclusively on water vendors (Onyenechere et al. 2012) and get worst as rain recedes (Nnaji et al. 2013) while it was only 3.8% covered by vendors in Kisumu (Ayalew et al. 2014).
However, the chemistry of these tests differs from that of the fossils, and modern Testacea are almost exclusively fresh-water - an extremely different environment.
Norwegian smolt production is characterized by almost exclusively utilizing surface waters as inlet-water sources, with lake inlets constituting 88% and river inlets 12%.
In the past, pumps were used almost exclusively for transporting water from a lower to higher level, that is, in a mine, water distribution, or in an irrigation installation.
Backyard Farms' chief executive, Roy Lubetkin, when pressed, pointed to biological controls like the wasps that allow the company to grow tomatoes without pesticides, and to the four-acre reservoir of reclaimed rain runoff that supplies, almost exclusively, their irrigation water.
Certainly, millions of people are concerned with freshwater fishery and houseboat living, principally in the deltaic areas of East Asia, where dwelling, marketing, and travel can be located almost exclusively on the water.
The city, which doesn't have a reliable source of groundwater, draws its supplies almost exclusively from surface water in its six major reservoirs.
Females sponged almost exclusively in deep water channels, with some interesting exceptions.
To date, however, sponging, which occurs almost exclusively in deep water channels [11] has been difficult to observe, and consequently has not been described in detail.
1) The Ilybius subaeneus group (genus Ilybius [ 36]) includes 33 recognized species, occurring almost exclusively in stagnant water and with generally wide geographical ranges throughout large parts of the Palearctic or Nearctic, with some Holarctic species [ 36, 37].
