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 |