Table 5. The association of bacteriophage status with the class of drinking water of the subjects.

Class of water	Bacteriophage Present		Bacteriophage Absent		Test of Significance
	Number	Percent	Number	Percent	X2 =25.21 Df = 3 p = 0.00
Highly satisfactory	55	47.0	0	0
Satisfactory	28	23.1	11	80
Suspicious	18	15.4	0	0
Not satisfactory	17	14.5	3	20
Total	118	100	14	100