Items

Usage

Langelier Saturation Index

Corrosivity Index

Safe

Unsafe

Safe zone

Unsafe zone

Jun.

(n = 206)

Agricultural

32

3

31

4

Living

87

1

68

20

Drinking

81

2

70

13

Sum.

200

6

169

37

(%)

97.1

2.9

82.0

18.0

Jul.

(n = 33)

Agricultural

10

0

10

0

Living

13

1

12

2

Drinking

9

0

7

2

Sum.

32

1

29

4

(%)

97.0

3.0

87.9

12.1

Sep.

(n = 194)

Agricultural

32

2

32

2

Living

91

0

80

11

Drinking

66

0

62

4

Industrial

3

0

2

1

Sum.

189

2

176

18

(%)

97.4

2.6

90.7

9.7

Oct.

(n = 33)

Agricultural

3

0

3

0

Living

14

0

10

4

Drinking

15

1

15

1

Sum.

32

1

28

5

(%)

97.0

3.0

84.9

15.1

Nov.

(n = 17)

Agricultural

1

0

1

0

Living

8

1

7

2

Drinking

5

2

6

1

Sum.

14

3

14

3

(%)

82.4

17.6

82.4

17.6

Usage

(n = 483)

Agricultural

78

5

77

6

Living

213

3

177

39

Drinking

176

5

160

21

Industrial

3

0

2

1

Sum.

470

13

416

67

(%)

97.3

2.7

86.1

13.9