Parameter

Unit

Water brands

WHO (2011)

USEPA (2016)

pH

7 - 7.7

6.5 - 8.5

6.5 - 8.5

${\text{HCO}}_3^{-}$

mg/l

14 - 383.7

125

-

Cl⁻

mg/l

0.3 - 40

250

250

${\text{NO}}_3^{-}$

mg/l

<0.3 - 8

50

10

${\text{SO}}_4^{2-}$

mg/l

2.74 - 1530

250

250

Ca²⁺

mg/l

8 - 576

100

140

Mg²⁺

mg/l

2.4 - 119

50

-

K⁺

mg/l

<0.2 - 6

12

3,5

Na⁺

mg/l

0.6 - 14.2

200

200