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Blair

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

Blair County

9/25/2007 - 10/5/2015, 53 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
49 0.0 0.0 200.5 19 38.8 0
E.
Coli
MPN/100
mL
49 0.0 0.0 4.2 4 8.2 0
pH
-
42 7.8 6.0 8.5 2 4.8 6.5-8.5
Total
Dissolved
Solids
mg/L 42 224.0 20.0 772.0 5 11.9 500
Corrosivity
Index*

-
20 0.1 -2.9 0.8 12 60.0 -
Hardness mg/L 23 113.1 0.8 359.6 - - -
Nitrate+Nitrite
N
mg/L 18 0.8 0.5 20.0 2 11.1 10
Chloride mg/L 1 5.0 5.0 5.0 0 0.0 250
Sulfate mg/L 1 16.0 16.0 16.0 0 0.0 250
Aluminum mg/L 0 - - - - - 0.05-0.2
Arsenic mg/L 3 0.00 0.001 0.002 0 0.0 0.01
Barium mg/L 3 0.01 0.00 0.10 0 0.0 2
Cadmium mg/L 2 0.00 0.002 0.004 0 0.0 0.005
Calcium mg/L 20 29.65 0.25 84.65 - - -
Chromium mg/L 2 0.0 0.002 0.005 0 0.0 0.1
Copper mg/L 22 0.01 0.01 1.78 1 4.5 1.0,1.3
Iron mg/L 23 0.2 0.1 10.4 8 34.8 0.3
Lead-1st
draw
mg/L 6 0.00 0.003 0.018 1 16.7 0.015
Lead-Running mg/L 7 0.003 0.003 0.006 0 0.0 0.015
Magnesium mg/L 20 7.39 0.05 32.77 - - -
Manganese mg/L 22 0.01 0.01 3.22 8 36.4 0.05
Mercury mg/L 3 0.00 0.000 0.001 0 0.0 0.002
Nickel mg/L 2 0.01 0.005 0.010 - - -
Sodium mg/L 0 - - - - - -
Zinc mg/L 2 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