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
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