Uranium in the Surrounding of San Marcos-Sacramento River Environment (Chihuahua, Mexico)

Table 3

Sampling parameters and major ions concentrations (mg_ion/L or ppm) dissolved in water from San Marcos River. Samples were collected in 2007.

Sample	pH	TDS	HCO3^−	SO4^−2	NO3^−	Cl^−	Na^+	Ca^+2	Mg^+2	K^+
SW1	7.6	227	135	57	1	10	5	29	7	3
SW2	7.6	433	248	91	2	10	33	48	14	5
SW3	6.9	217	207	22	2	33	12	34	11	5
SW4	7.9	172	198	1	2	1	17	17	7	3
SW5	7.3	405	303	5	9	0.5	25	32	12	6
SW6	8.1	280	233	3	2	2	24	34	10	5
SW7	7.5	133	168	2	2	0.2	17	17	6	4
SW8	7.9	123	129	1	1	2	13	14	4	4
SW9	7.5	95	56	0.1	2	38	8	7	2	4
SW10	7.4	157	73	13	1	38	5	12	3	4