Statistics

2010

2005

2015

Census Data

Violations

TTHM

Violations

TTHM

Population

Income

Systems

Total

TTHM

[ppb]

Total

TTHM

[ppb]

% Change

Mean (M)

5,577,250

$48,004

4462.3

2150.0

83.6

30.5

1495.8

24.7

58.9

+15.8%

Standard Error

1.2E+6

979.9

1122.2

517.1

28.7

5.3

348.8

6.5

6.7

6.7

Variance

1.7E+13

1.2E+7

1.5E+7

3.2E+6

9947

330.8

1.5E+6

508.6

533.5

543.7

Standard Deviation (SD)

4.1E+6

3,394.5

2470.0

1138.2

63.4

11.6

767.8

14.3

14.7

2.3