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Criteria of pollution indicators in sediment based on the EF, CF, Igeo and PLI values.
| EF | Pollution status | CF | Pollution status | Igeo | Pollution status | PLI | Pollution status |
|---|---|---|---|---|---|---|---|
| >1 | With anthropogenic sources | >6 | Very high | >5 | Extreme | >1 | Polluted |
| >3 and <6 | Considerable | 4–5 | Strong to extremely strong | ||||
| >1 and <3 | Moderate | 3–4 | Strong | ||||
| <1 | Without anthropogenic sources | <1 | Low | 2–3 | Moderate to strong | <1 | Unpolluted |
| 1–2 | Moderate | ||||||
| 0–1 | Unpolluted to moderate | ||||||
| <0 | Unpolluted |
