1975 – 1985 (132 months) | |||||
---|---|---|---|---|---|
Contaminant | Mean (μg/L) | Median (μg/L) | Range (μg/L) | # Months >MCL | # Months >100 μg/L |
Tetrachloroethylene | 75.7 | 84.9 | 0 – 158.1 | 117 | 16 |
Trichloroethylene | 3.1 | 3.5 | 0 – 6.6 | 11 | 0 |
Vinyl chloride | 5.6 | 6.2 | 0 – 12.3 | 117 | 0 |
1975 – 1979 (60 months) | |||||
Tetrachloroethylene | 68.3 | 68.2 | 43.8 – 94.8 | 60 | 0 |
Trichloroethylene | 2.8 | 2.9 | 1.7 – 3.9 | 0 | 0 |
Vinyl chloride | 5.2 | 5.5 | 2.6 – 7.3 | 60 | 0 |
January 1980 – January 1985 (61 months)* | |||||
Tetrachloroethylene | 96.1 | 95.5 | 0¥ – 158.1 | 57 | 16 |
Trichloroethylene | 3.9 | 3.9 | 0¥ – 6.6 | 11 | 0 |
Vinyl chloride | 7.0 | 7.0 | 0¥ – 12.3 | 57 | 0 |