Water or water purification process can reduce the concentration of various types of particles including parasites, bacteria, algae, viruses, fungi in water, as well as the amount of particles mixed with water from the surface due to rain can also be reduced to a large extent.
Drinking water quality standards are usually set by governments or international standards.
Depending on the purpose of water use, the minimum and maximum concentration values of water pollutants are determined. Whether water or water quality is appropriate cannot be determined by visual inspection.
Water cannot be purified by the simple process of boiling water from an unknown source or separating out all possible contaminants dissolved in that water with a simple household filter.
Even natural spring water – which in the nineteenth century was considered suitable for all practical purposes – is now advised to be used experimentally, if necessary.
Chemical and microbiological analysis, although expensive, are two tests that provide the necessary information to determine the type of purification process to be adopted.
826.311 SRY