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 |