Classification of Surface Water Quality
The field of hydrometry classifies surface water quality into five categories:
- Class 1 is extra-clean fresh surface water resource used for conservation, not necessarily required to pass through a water treatment process, and requiring only an ordinary process for pathogenic destruction and ecosystem conservation where basic organisms can breed naturally.
- Class 2 is very clean fresh surface water resource used for consumption, which requires an ordinary water treatment process before use, for aquatic organism of conservation, fisheries, and recreation.
- Class 3 is medium-clean fresh surface water resource used for consumption, which requires passing through an ordinary treatment process before use for agriculture.
- Class 4 is fairly clean fresh surface water resource used for consumption, but requires a special water treatment process before use for industry.
- Class 5 is the source which is not classified in class 1-4 and used only for navigation.
Definition: Surface water is taken from the lakes, rivers, waterfalls and sea. It plays the largest role of shaping the geography of land.
Read more about this topic: Surface Water
Famous quotes containing the words surface, water and/or quality:
“How easily it falls, how easily I let drift
On the surface of morning feathers of self-reproach:
How easily I disperse the scolding of snow.”
—Philip Larkin (1922–1986)
“Smooth runs the water where the brook is deep.”
—William Shakespeare (1564–1616)
“So much has already been said about Shakespeare that there doesn’t seem to be anything more to say; yet it is the quality of the spirit that it forever stimulates the spirit.”
—Johann Wolfgang Von Goethe (1749–1832)