Table 3 Distribution of Drinking Water Contaminants Tested by Water Source

Nitrate (mg/L)

0.9 ± 2.9

0.2

0.2-27.5

1.7 ± 1.6

1.1

0.2-5.2

0.001^a

   No treatment device

1.7 ± 4.3

0.3

0.2-20.4

1.8 ± 1.7

1.03

0.2-4.9

0.09^b, 0.28^c

   Reverse osmosis or distillation

0.5 ± 1.0

0.2

0.2-6.1

0.7 ± 0.8

0.3

0.2-1.8

   Other Filter

0.7 ± 2.7

0.2

0.2-27.5

1.8 ± 1.6

1.2

0.2-5.2

Copper (mg/L)

0.05 ± 0.2

0.005

0.001-2.2

0.1 ± 0.1

0.03

0.01-1.5

0.07^a

Sulfate (mg/L)

136 ± 292

50.8

4-3570

141 ± 95

97.2

4-432

0.82^a

Total Coliform Present (% positive)

28 (14%)

4 (3.5%)

0.005^a

Fecal Coliform Present (% positive)

3 (1.5%)

0