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 |