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Somerset

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

Somerset County

8/20/2007 - 6/29/2018, 46 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
45 0.0 0.0 200.5 22 48.9 0
E.
Coli
MPN/100
mL
45 0.0 0.0 8.7 7 15.6 0
pH
-
40 7.6 4.8 8.3 9 22.5 6.5-8.5
Total
Dissolved
Solids
mg/L 40 145.0 20.0 363.0 0 0.0 500
Corrosivity
Index*

-
11 -0.0 -3.6 0.4 5 45.5 -
Hardness mg/L 12 77.3 12.4 264.2 - - -
Nitrate+Nitrite
N
mg/L 11 0.5 0.2 13.1 1 9.1 10
Chloride mg/L 5 5.0 2.0 16.5 0 0.0 250
Sulfate mg/L 4 9.1 3.0 74.0 0 0.0 250
Aluminum mg/L 5 0.0 0.0 0.1 1 20.0 0.05-0.2
Arsenic mg/L 9 0.00 0.003 0.017 2 22.2 0.01
Barium mg/L 11 0.08 0.01 0.30 0 0.0 2
Cadmium mg/L 7 0.00 0.001 0.001 0 0.0 0.005
Calcium mg/L 11 21.68 3.89 81.11 - - -
Chromium mg/L 7 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 15 0.02 0.01 2.28 1 6.7 1.0,1.3
Iron mg/L 14 0.1 0.0 0.3 1 7.1 0.3
Lead-1st
draw
mg/L 8 0.00 0.003 0.011 0 0.0 0.015
Lead-Running mg/L 11 0.003 0.003 0.017 1 9.1 0.015
Magnesium mg/L 8 8.42 1.27 15.00 - - -
Manganese mg/L 13 0.04 0.01 14.98 6 46.2 0.05
Mercury mg/L 10 0.00 0.001 0.655 4 40.0 0.002
Nickel mg/L 5 0.01 0.005 0.005 - - -
Sodium mg/L 4 0.07 0.03 0.32 - - -
Zinc mg/L 8 0.01 0.00 0.01 0 0.0 5

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