Table 1 Classification of pollution level in groundwater39.
From: Spatial variations and health risk assessment of heavy metal levels in groundwater of Qatar
Ii/NCPI value | Pollution level |
|---|---|
≤ 0.7 | No pollution |
0.7–1 | Slight pollution |
1–2 | Light pollution |
2–3 | Moderate pollution |
> 3 | High pollution |
