TABLE 5.

Test scores of samples’ mutagenicity using the T98 strain.

#	Plate	Concentration	Bacteria	Day 4	Day 5	Day 6
1	Blank –ws9 (tap water)	100%	-	0	0	0
2	Background wS9	-	+	0	0	0
3	Positive control	-	+	95	96	96
4	WWTP effluent I	100%	+	91	91	91
5	WWTP effluent-I ws9	100%	+	95	95	95
6	WWTP effluent-II	19%	+	96	96	96
7	Tap water I	100%	+	95	95	95
8	Tap water-I ws9	100%	+	95	95	95
9	Tap water –II	19%	+	95	95	95
10	Bottled water ‘A’-I	100%	+	96	96	96
11	Bottled water ‘A’- I wS9-	100%	+	96	96	96
12	Bottled water ‘A’-II	19%	+	96	96	96
13	Bottled water ‘B’-I	100%	+	96	96	96
14	Bottled water ‘B’-I wS9	100%	+	96	96	96
15	Bottled water ‘B’-II	19%	+	96	96	96