Statistics

2010

2005

2015

Census Data

Violations

TTHM

Violations

TTHM

Population

Income

Systems

Total

TTHM

[ppb]

Total

TTHM

[ppb]

% Change

Mean (M)

7,663,038

$43,244

1567.4

2292.1

193.2

36.1

2080.6

89.6

67.7

+101.3%

Standard Error

1.8E+6

1588.0

472.3

713.9

74.6

2.6

715.4

32.1

2.9

19.0

Variance

4.4E+13

4.0E+7

3.1E+6

7.1E+6

7.8E+4

91.5

7.2E+6

1.4E+4

119.6

5029.4

Standard Deviation (SD)

6.6E+6

5,942.4

1767.3

2671.4

279.3

9.6

2676.8

120.3

10.9

70.9