Guidelines for drinking water as per different organizations.

Table 1: Guidelines for drinking water as per different organizations.

Parameters	WHO (mg/L)	CDWQ (mg/L)	US EPA (mg/L)	EU. DWD (mg/L)
Ca	100	200	N/A	N/A
Cd	0.003	0.005	0.005	0.005
Cr (III)	N/A	N/A	N/A	N/A
Cu	2.0	1.0	1.3	2.0
Li	N/A	N/A	N/A	N/A
Mg	50	50	N/A	N/A
Pb	0.01	0.01	0.015	0.01
Sr	N/A	N/A	N/A	N/A
Zn	3.0	5	5	N/A

WHO: World Health Organization; CDWQ: Canadian Drinking Water Quality; US EPA: United State Environmental Protection Agency; EU DWD: European Union Drinking Water Directive; N/A: No guideline available