Table 2 Threshold values for WAWQI calculation.

From: Spatiotemporal variability of surface water quality in tropical agriculture-dominated catchments: insights from water quality indices

Parameters

WHO/UNBS standards

1. DO (mg/L)

6

2. pH

8.5

3. Turbidity (NTU)

25

4. EC (µS/cm)

2500

5. NH₄⁺-N (mg/L)

0.2

6. NO₂⁻-N (mg/L)

3

7. NO₃⁻-N (mg/L)

13.29

8. SRP (mg/L)

2.2

9. Cl⁻ (mg/L)

250

10. Na⁺ (mg/L)

200

11. SO₄²⁻ (mg/L)

400

12. TH (mg/L)

200

13. Temperature (OC)

25

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