Table 1.

Concentrations of phosphate ion in the water resources samples within the study area (mg/L)⁸.

Surface water	Sample no.	PO43− (Permissible level = 1 mg/L)
Nile river	1	0.044
	2	0.311
	3	0.025
El-Khashab and El-Hager canals	4	1.185
	5	0.356
	6	1.298
	7	0.246
El-Saff wastewater canal	8	0.442
	9	0.988
	10	1.688
	11	0.015
	12	0.299
	13	0.134
Groundwater	14	0.008
	15	0.015
	16	0.442
	17	0.09
	18	5.287
	19	0.016
	20	0.219
	21	2.208
	22	0.207
	23	0.071
	24	0.08
	25	0.140
	26	0.093
	27	0.120
	28	0.091
	29	0.091
	30	0.218
	31	0.292
	32	0.11
	33	0.2
	34	0.25
	35	0.403