Water property

P

Tapwater

Wastewater

P

<0.01

<0.01b^†

10.6a

K

<0.01

1.25b

23.3a

Ca

0.51

24.4a

28.2a

Mg

<0.01

1.86b

45.6a

S

<0.01

7.52b

13.2a

Na

<0.01

5.85b

39.6a

Fe

<0.01

0.04b

0.28a

Mn

<0.01

<0.01b

0.16a

Zn

<0.01

<0.01b

0.02a

Cu

<0.01

<0.01b

0.03a