Skip to main content

Table 1 Estimated monthly average contaminant concentrations in the Tarawa Terrace system, 1975 – 1985

From: Evaluation of mortality among marines and navy personnel exposed to contaminated drinking water at USMC base Camp Lejeune: a retrospective cohort study

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
  1. *Two contaminated wells were shut down in January 1985. Estimated monthly average tetrachloroethylene levels from February through December 1985 were <4 μg/L.
  2. ¥One contaminated well was shut down for maintenance during 7/80 – 8/80 and 1/83 – 2/83. The other contaminated well was not in use until August 1984.