Table 3 WHO guidelines22and weight values7.

From: Assessment of groundwater pollution using PIG index and microbiological indicators in the Angads plain, Morocco

Parameter

Unit

WHO guidelines

Rw

Wp

TDS

mg/L

1000

5

0.152

Ca2+

mg/L

200

3

0.091

Mg2+

mg/L

150

3

0.091

Na+

mg/L

200

4

0.121

K+

mg/L

12

3

0.091

Cl−

mg/L

250

4

0.121

SO42−

mg/L

250

4

0.121

HCO3−

mg/L

300

2

0.060

NO3−

mg/L

50

5

0.152

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