Statistics

2010

2005

2015

Census Data

Violations

TTHM

Violations

TTHM

Population

Income

Systems

Total

TTHM

[ppb]

Total

TTHM

[ppb]

% Change

Mean (M)

5,635,339

$57,313

3346.7

3125.1

67.2

30.6

3466.6

17.0

67.6

+160.7%

Standard Error

1.8E+6

2372.7

923.9

1281.8

41.7

4.2

1638.7

6.6

5.1

37.0

Variance

3.6E+13

6.2E+7

9.4E+6

1.8E+7

1.9E+4

198.1

2.9E+7

433.1

287.3

1.5E+4

Standard Deviation (SD)

6.0E+6

7869.4

3064.2

4251.4

138.3

14.1

5435.0

20.8

16.9

122.8