Assessment of the chemical, physical and biological properties of water in relation to its intended use.
The capacity of water to consume soap, chiefly because of dissolved calcium and magnesium ions. Quantitative results are commonly expressed as a calcium carbonate equivalent; this does not mean all the hardness originally existed as dissolved calcium carbonate.
A historical quantitative test in which a standardized soap solution is added to a measured water sample until a specified persistent lather appears. A reagent blank accounts for the amount needed to form the lather itself.
The historical operational fraction of Ammonia released by alkaline permanganate after preliminary removal of free Ammonia. It is neither a specific albumen measurement nor necessarily all organic nitrogen.
Investigation of a water supply and its surroundings to identify plausible contamination routes and failures of protective barriers.
Examination of water for specified microorganisms or microbial indicators using validated procedures. Chemical clarity alone cannot establish microbiological safety.
The capacity of water to dissolve lead from materials it contacts; dissolved release should be distinguished from carriage of particles containing lead.[ref]
Lead in Drinking Water by the Drinking Water Inspectorate. Sources and factors affecting concentration
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