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Somerset

Summary of Drinking Water Samples Tested by the Penn State Agricultural Analytical Services Laboratory

Somerset County

8/20/2007 - 6/28/2016, 34 Samples

Test Parameter Units Number of Samples Tested Median Minimum Maximum Number of samples failing EPA Std Percent of samples failing EPA Std EPA Drink Water Std
Total
Coliform
MPN/100
mL
33 0.0 0.0 200.5 16 48.5 0
E.
Coli
MPN/100
mL
33 0.0 0.0 4.2 4 12.1 0
pH
-
29 7.7 5.0 8.3 5 17.2 6.5-8.5
Total
Dissolved
Solids
mg/L 29 142.0 20.0 363.0 0 0.0 500
Corrosivity
Index*

-
8 0.1 -3.5 0.4 3 37.5 -
Hardness mg/L 9 89.6 18.7 212.7 - - -
Nitrate+Nitrite
N
mg/L 9 0.5 0.5 9.7 0 0.0 10
Chloride mg/L 5 5.0 2.0 16.5 0 0.0 250
Sulfate mg/L 3 10.0 3.0 74.0 0 0.0 250
Aluminum mg/L 4 0.0 0.0 0.1 0 0.0 0.05-0.2
Arsenic mg/L 7 0.00 0.003 0.014 1 14.3 0.01
Barium mg/L 9 0.08 0.01 0.30 0 0.0 2
Cadmium mg/L 5 0.00 0.001 0.001 0 0.0 0.005
Calcium mg/L 8 24.22 5.09 60.43 - - -
Chromium mg/L 5 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 14 0.02 0.01 0.73 0 0.0 1.0,1.3
Iron mg/L 9 0.1 0.1 0.3 1 11.1 0.3
Lead-1st
draw
mg/L 6 0.00 0.003 0.006 0 0.0 0.015
Lead-Running mg/L 10 0.003 0.003 0.006 0 0.0 0.015
Magnesium mg/L 8 8.42 1.27 15.00 - - -
Manganese mg/L 10 0.01 0.01 0.38 3 30.0 0.05
Mercury mg/L 6 0.00 0.001 0.001 0 0.0 0.002
Nickel mg/L 5 0.01 0.005 0.005 - - -
Sodium mg/L 0 - - - - - -
Zinc mg/L 5 0.01 0.01 0.01 0 0.0 5

*For corrosivity index, failure criteria based on less than -0.5 or greater than 0.5