Water Definitions

Water that does not form a lather easily with soap

the purest form of water as all dissolved and suspended solids, including dissolved gases have been removed

normally contain dissolved gases as well as any organic material which may be dissolved in the water

the amount of dissolved oxygen consumed by biological action when a sample of water is kept at 20^oC, in the dark for 5 days

the enrichment of water with nutrients (phosphates and nitrates), which leads to excessive growth of algae