Parameter

EPA (2016)*

WHO (2013)*

SASO (2009)*

Score pts**

pH

7.0 - 7.3

6.5 - 8.5

6.5 - 8.5

3

TDS (mg/L)

500

600

500

3

Ca (mg/L)

140

100

200

1

Mg (mg/L)

-

50

150

1

Na (mg/L)

95

200

100

2

K (mg/L)

3.5

12

-

1

HCO₃ (mg/L)

-

125

-

0

SO₄ (mg/L)

250

250

150

4

Cl (mg/L)

250

250

150

4

F (mg/L)

2

1.5

0.8

2

BrO₃ (mg/L)***

0.01

10

0.025

3, 4 or 5

Fe (mg/L)

0.3

0.3

0.3

2