Statistics

2010

2005

2015

Census Data

Violations

TTHM

Violations

TTHM

Population

Income

Systems

Total

TTHM

[ppb]

Total

TTHM

[ppb]

% Change

Mean (M)

6,162,876

$49,755

2735.4

2541.5

100.5

30.9

2456.4

42.8

64.3

+107.1%

Standard Error

9.7E+5

1139.9

413.3

408.7

25.5

1.9

441.6

10.6

2.3

13.3

Variance

4.7E+13

6.5E+7

8.5E+6

8.3E+6

3.2E+4

168.7

9.8E+6

5405.6

262.3

8708.0

Standard Deviation (SD)

6.8E+6

8060.4

2922.6

2890.1

178.7

12.9

3122.9

73.5

16.2

93.3