Table 3 Results (MR: mean ± deviation) of the Ames test (TA98) for Plant B

From: Mutagenicity of drinking water sampled from the Yangtze River and Hanshui River (Wuhan section) and correlations with water quality parameters

Period

 

Dose (L/plate)

2007

2008

2009

−S9

+S9

−S9

+S9

−S9

+S9

Level period

Raw water

0.5

1.71 ± 0.10

1.30 ± 0.16

2.26 ± 0.74

1.51 ± 0.17

1.04 ± 0.41

1.10 ± 0.10

  

1

2.48 ± 0.17

2.09 ± 0.44

2.61 ± 0.11

2.62 ± 0.50

0.99 ± 0.48

1.25 ± 0.13

  

2

5.41 ± 0.24

3.35 ± 0.29

1.40 ± 0.24

4.73 ± 0.19

1.23 ± 0.29

1.84 ± 0.23

 

Finished water

0.5

1.99 ± 0.12

3.03 ± 0.16

3.08 ± 0.50

1.65 ± 0.19

2.45 ± 0.10

1.54 ± 0.11

  

1

3.41 ± 0.29

4.80 ± 0.31

3.64 ± 0.04

2.34 ± 0.13

3.50 ± 0.34

2.68 ± 0.55

  

2

9.95 ± 0.65

10.1 ± 0.31

7.11 ± 0.79

3.73 ± 0.47

6.08 ± 0.09

5.05 ± 0.21

 

Distribution water

0.5

1.48 ± 0.05

1.38 ± 0.19

2.70 ± 0.18

1.77 ± 0.02

1.90 ± 0.70

1.82 ± 0.20

  

1

1.94 ± 0.13

1.79 ± 0.46

4.05 ± 0.55

2.86 ± 0.07

3.33 ± 0.31

2.96 ± 0.25

  

2

3.39 ± 0.19

2.52 ± 0.31

10.89 ± 0.00

4.32 ± 0.51

5.20 ± 0.00

5.21 ± 0.23

Wet period

Raw water

0.5

0.85 ± 0.17

1.21 ± 0.15

1.10 ± 0.76

1.44 ± 0.44

1.28 ± 0.69

1.09 ± 0.42

  

1

1.00 ± 0.03

1.32 ± 0.05

1.68 ± 0.20

1.58 ± 0.34

1.40 ± 0.82

1.48 ± 0.51

  

2

2.24 ± 0.55

1.92 ± 0.07

2.22 ± 0.25

3.28 ± 0.23

2.05 ± 0.41

1.76 ± 0.25

 

Finished water

0.5

1.35 ± 0.49

1.10 ± 0.08

3.90 ± 0.71

2.19 ± 0.47

1.51 ± 0.54

1.64 ± 0.40

  

1

1.91 ± 0.21

1.23 ± 0.06

5.89 ± 0.29

2.89 ± 0.25

1.85 ± 0.35

1.50 ± 0.22

  

2

2.39 ± 0.38

1.47 ± 0.10

10.96 ± 0.49

7.19 ± 0.48

2.63 ± 0.49

2.42 ± 0.02

 

Distribution water

0.5

1.43 ± 0.59

1.39 ± 0.11

1.70 ± 0.87

1.27 ± 0.29

1.42 ± 0.09

1.26 ± 0.47

  

1

1.66 ± 0.56

1.51 ± 0.19

2.94 ± 0.42

1.97 ± 0.02

1.86 ± 0.33

1.62 ± 0.25

  

2

2.31 ± 0.59

2.10 ± 0.37

3.77 ± 0.51

3.15 ± 0.04

3.02 ± 0.33

2.39 ± 0.60

Dry period

Raw water

0.5

3.06 ± 0.17

0.77 ± 0.30

1.08 ± 0.29

0.71 ± 0.12

1.26 ± 0.06

1.89 ± 0.22

  

1

2.23 ± 0.29

0.82 ± 0.15

0.93 ± 0.33

0.77 ± 0.44

1.42 ± 0.28

2.43 ± 0.05

  

2

4.18 ± 1.09

1.68 ± 0.16

1.15 ± 0.53

0.81 ± 0.09

2.28 ± 0.28

3.50 ± 0.58

 

Finished water

0.5

3.16 ± 0.42

1.71 ± 0.14

1.01 ± 0.31

1.05 ± 0.05

1.63 ± 0.25

1.88 ± 0.51

  

1

5.15 ± 0.41

2.17 ± 0.27

1.21 ± 0.23

0.95 ± 0.30

2.55 ± 0.69

2.29 ± 0.32

  

2

10.80 ± 1.76

4.77 ± 0.62

1.25 ± 0.17

1.30 ± 0.09

3.83 ± 0.82

3.82 ± 0.24

 

Distribution water

0.5

3.82 ± 0.62

1.50 ± 0.06

1.29 ± 0.02

1.08 ± 0.12

1.26 ± 0.73

1.65 ± 0.29

  

1

4.97 ± 1.84

1.92 ± 0.11

1.58 ± 0.54

1.08 ± 0.27

1.93 ± 0.01

2.06 ± 0.43

  

2

9.50 ± 1.02

3.93 ± 0.60

1.73 ± 0.67

1.23 ± 0.47

2.54 ± 0.19

2.95 ± 0.13

  1. MR: mutation ratio, the fold-increase over the negative control plates.