Table 2 Results (MR: mean ± deviation) of the Ames test (TA100) for Plant A

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

0.97 ± 0.02

0.96 ± 0.01

1.06 ± 0.06

0.94 ± 0.04

0.96 ± 0.12

0.98 ± 0.11

  

1

1.25 ± 0.06

1.09 ± 0.03

1.02 ± 0.08

1.06 ± 0.06

1.07 ± 0.12

0.99 ± 0.11

  

2

0.54 ± 0.02

1.13 ± 0.03

1.05 ± 0.21

1.01 ± 0.02

0.99 ± 0.22

1.11 ± 0.13

 

Finished water

0.5

0.77 ± 0.00

1.08 ± 0.07

0.88 ± 0.13

0.79 ± 0.03

1.63 ± 0.11

0.97 ± 0.04

  

1

0.75 ± 0.02

1.14 ± 0.04

0.85 ± 0.05

0.70 ± 0.09

1.39 ± 0.22

1.06 ± 0.14

  

2

0.38 ± 0.01

1.46 ± 0.01

1.20 ± 0.01

0.51 ± 0.10

2.08 ± 0.06

1.21 ± 0.11

 

Distribution water

0.5

0.86 ± 0.07

1.09 ± 0.05

1.07 ± 0.10

0.99 ± 0.05

1.05 ± 0.09

0.99 ± 0.06

  

1

0.87 ± 0.07

1.25 ± 0.05

1.20 ± 0.12

1.07 ± 0.12

1.18 ± 0.15

0.90 ± 0.10

  

2

0.35 ± 0.01

1.45 ± 0.07

1.50 ± 0.18

1.27 ± 0.10

1.46 ± 0.15

1.19 ± 0.06

Wet period

Raw water

0.5

1.33 ± 0.16

1.05 ± 0.07

1.04 ± 0.10

0.92 ± 0.03

1.10 ± 0.08

1.01 ± 0.04

  

1

1.01 ± 0.26

0.96 ± 0.15

1.03 ± 0.13

0.90 ± 0.13

1.04 ± 0.00

0.93 ± 0.05

  

2

1.28 ± 0.36

1.19 ± 0.09

0.93 ± 0.13

0.89 ± 0.06

1.14 ± 0.18

1.04 ± 0.01

 

Finished water

0.5

1.17 ± 0.33

1.02 ± 0.09

1.16 ± 0.03

0.84 ± 0.04

1.01 ± 0.17

0.96 ± 0.08

  

1

1.14 ± 0.29

1.11 ± 0.02

1.21 ± 0.01

0.84 ± 0.14

1.12 ± 0.09

1.05 ± 0.04

  

2

1.05 ± 0.05

1.27 ± 0.06

1.34 ± 0.06

0.96 ± 0.05

1.27 ± 0.04

1.07 ± 0.00

 

Distribution water

0.5

1.96 ± 0.07

1.09 ± 0.09

1.22 ± 0.07

0.80 ± 0.07

1.06 ± 0.22

1.14 ± 0.11

  

1

1.79 ± 0.10

0.93 ± 0.08

1.07 ± 0.03

0.98 ± 0.02

1.06 ± 0.03

0.98 ± 0.04

  

2

1.09 ± 0.18

1.15 ± 0.10

1.42 ± 0.19

1.00 ± 0.11

1.25 ± 0.21

1.16 ± 0.09

Dry period

Raw water

0.5

0.88 ± 0.10

1.05 ± 0.08

1.16 ± 0.02

0.84 ± 0.11

1.06 ± 0.13

1.09 ± 0.09

  

1

0.89 ± 0.12

1.00 ± 0.05

1.00 ± 0.21

0.85 ± 0.08

0.99 ± 0.13

1.12 ± 0.05

  

2

0.92 ± 0.03

1.13 ± 0.03

0.93 ± 0.09

0.92 ± 0.13

1.87 ± 0.01

1.23 ± 0.10

 

Finished water

0.5

0.94 ± 0.07

1.06 ± 0.06

1.24 ± 0.04

0.79 ± 0.11

1.24 ± 0.14

0.99 ± 0.07

  

1

1.01 ± 0.02

1.01 ± 0.08

1.02 ± 0.01

0.89 ± 0.14

1.29 ± 0.01

1.14 ± 0.03

  

2

1.07 ± 0.05

1.05 ± 0.11

0.98 ± 0.02

1.06 ± 0.05

1.95 ± 0.04

1.29 ± 0.02

 

Distribution water

0.5

1.00 ± 0.05

1.04 ± 0.15

1.46 ± 0.15

0.93 ± 0.09

1.14 ± 0.11

1.10 ± 0.11

  

1

1.09 ± 0.09

1.06 ± 0.06

0.93 ± 0.05

0.77 ± 0.02

1.38 ± 0.23

1.24 ± 0.04

  

2

1.41 ± 0.24

1.17 ± 0.10

0.88 ± 0.00

0.88 ± 0.10

1.63 ± 0.12

1.84 ± 0.13

  1. TA100, Salmonella typhimurium strain used in the Ames test to detect base-replacement mutants.
  2. MR: mutation ratio, the fold-increase over the negative control plates.
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