| Statistics | 2020 | 2016 | 2020 | ||||||
| Census Data | Violations Cl− | TTHM | Cl− TTHM | TTHM | |||||
| Population | Income | Systems | Total | [ppm] | [ppb] | [ppm] | [ppb] | % Change | |
| Mean (M) | 8,046,116 | $59,173 | 18,914 | 53,034 | 1.5 | 51.1 | 1.6 | 43.6 | 24.0% |
| Standard Error | 2.0E+6 | 2260 | 7443 | 13,758 | 0.2 | 4.6 | 0.2 | 4.7 | 5.9 |
| Variance | 5.6E+13 | 7.2E+7 | 7.8E+8 | 2.7E+9 | 0.6 | 297.3 | 0.5 | 304.1 | 5.3 |
| Standard Deviation (SD) | 7.5E+6 | 8465.5 | 27,848.9 | 51,480 | 0.7 | 17.2 | 0.7 | 17.4 | 2.3 |