Table 5 Water-quality Classification: The standard of a comprehensive pollution index
Combined pollution index | Water quality classification | Description of water quality conditions |
|---|---|---|
P < 0.8 | Pass | Most items were not detected, and individual detections were within the standard |
0.8 ≤ P < 1.0 | Basic pass | Individual project detection value exceeds the standard |
1.0 ≤ P < 2.0 | Pollution | A significant portion of the detected value exceeds the standard |
P > 2.0 | Severe pollution | A significant portion of the project detection value exceeds the standard several times |