Table 3: Some ions of interest present in tap water, groundwater, and seawater.

LeachantpHSoluble cations (ppm)Soluble anions (ppm)
K+Na+Mg2+Ca2+Cl

Tap water6.900.081.071.21.40.770.71.8
Groundwater7.20231491374137317272
Seawater7.938.4652.696.928.06496.960.8183