. 2012 Apr 30;2012:403574. doi: 10.1100/2012/403574

Table 4.

Mineral concentrations in tap water (TW) samples and the standard limits recommended by international regulations.

Tap water	Na	Mg	K	Ca	Fe^a	Cu^a	Zn^a	Cr^a	Mn^a	Ni^a	As^a	Cd^a	Pb^a	F	Cl	NO₃	SO₄
TW 1	11.23	3.14	2.48	4.2	0.06	0.06	0.02	ND	0.01	1.39	0.49	0.38	ND	0.31	21.01	0.61	14
TW 2	4.88	4.11	3.0	23.1	0.03	0.09	0.03	ND	0.02	1.26	6.14	0.37	ND	0.24	6.23	0.64	17.12
TW 3	2.99	1.31	2.49	6.04	0.05	0.04	0.02	ND	0.004	0.68	0.33	0.39	ND	0.39	9	0.62	19.23
TW 4	2.82	0.95	2.31	2.01	0.06	0.02	0.004	ND	0.03	1.91	0.38	0.37	ND	0.3	6.08	0.82	14.16
TW 5	2.15	0.56	2.43	9.01	0.03	0.03	0.005	ND	0.03	0.36	0.16	0.36	ND	0.49	8	0.83	6.14
TW 6	1.95	0.45	2.45	5.36	0.03	0.02	0.002	ND	0.02	0.8	0.26	0.37	ND	0.29	10.11	1.61	6.11
TW 7	1.8	0.07	1.35	0.54	0.06	0.02	0.01	ND	ND	0.97	0.24	0.39	ND	0.38	5.02	0.65	5.04
TW 8	1.22	0.45	1.22	2.61	0.09	0.01	0.01	ND	0.01	0.58	0.42	0.36	ND	0.58	5.02	0.83	1.06
TW 9	3.74	0.43	3.38	3.6	0.03	0.06	0.01	ND	0.004	0.52	0.48	0.37	ND	0.2	8.04	1.31	20
TW 10	2.28	0.39	2.15	4.28	0.09	0.07	0.36	ND	0.04	0.85	0.22	0.38	ND	0.66	14	0.94	5.4
TW 11	3.04	0.4	2.36	1.84	0.09	0.08	0.06	ND	0.01	0.72	0.46	0.4	ND	0.58	11.32	0.92	9.09
TW 12	4.95	0.48	3.75	3.68	0.03	0.13	0.02	ND	0.01	0.53	0.95	0.39	ND	0.47	16.12	1.93	4.11
TW 13	3.84	0.25	3.04	1.99	0.03	0.06	0.02	ND	0.03	0.8	1.24	0.38	ND	0.71	16	11	7.02
TW 14	3.08	0.64	4.59	10.49	0.03	0.04	0.004	ND	0.1	0.52	0.31	0.46	ND	0.69	27.05	0.91	6.06
TW 15	5.19	1.12	4.87	3.27	0.03	0.05	0.005	ND	0.03	0.64	0.34	0.44	ND	0.34	37.07	1.52	5.01
TW 16	4.15	1.24	4.81	6.45	0.07	0.2	0.08	ND	0.06	0.85	1.1	0.43	ND	0.19	26.02	0.63	7.12
TW 17	3.57	1.35	6.02	7.61	0.02	0.08	0.02	ND	0.03	1.65	0.36	0.38	ND	0.34	29	1.14	17.34
TW 18	3.48	2.13	5.82	12.1	0.06	0.1	0.1	ND	0.05	1.53	0.51	0.4	ND	0.68	28.04	1.12	31.22
TW 19	1.61	0.3	2.15	9.44	0.03	0.11	0.01	ND	0.05	0.26	0.32	0.37	ND	0.47	29.05	0.74	10.42
TW 20	5.21	2.03	2.96	14.48	0.05	0.26	0.02	ND	ND	2.63	0.53	0.38	ND	0.14	34.19	0.71	8.6
TW 21	2.05	0.28	0.9	1.11	0.06	0.13	0.004	ND	ND	0.75	0.2	0.38	ND	0.15	25.01	0.53	ND
TW 22	2.13	0.29	0.97	3.2	0.03	0.12	0.004	ND	0.03	0.43	0.26	0.39	ND	0.2	27	0.33	6.04
TW 23	10.84	2.52	6.61	11.2	0.33	0.13	0.03	ND	ND	0.71	0.87	0.85	3.8	0.2	48.04	0.34	9.07
TW 24	15.03	2.53	4.62	12.02	0.04	0.14	0.05	0.001	0.05	0.42	2.76	0.5	1.5	0.23	38.23	2.72	15.33
WHO 2006	200	—	—	—	300	2000	—	50	500	20	10	3	10	1.5	250	50	500
EU 1998	200	—	—	—	200	2000	—	50	50	20	10	5	10	1.5	250	50	250
USEPA 2009	—	—	—	—	300	1300	5000	100	50	—	10	5	15	4	250	10	250

All data were presented as mean of three replicates (mg/L). ^aConcentration of minerals in μg/L. Tr: trace; ND: not detected; WHO: World Health Organization Guidelines; EU: European Union Standards; USEPA: United States Environmental Protection Agency Drinking Water Contaminants Regulations.