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Blair

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

Blair County

9/25/2007 - 12/1/2017, 59 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
55 0.0 0.0 200.5 22 40.0 0
E.
Coli
MPN/100
mL
55 0.0 0.0 4.2 4 7.3 0
pH
-
47 7.8 6.0 8.5 2 4.3 6.5-8.5
Total
Dissolved
Solids
mg/L 48 239.0 20.0 772.0 6 12.5 500
Corrosivity
Index*

-
23 0.3 -2.9 0.9 15 65.2 -
Hardness mg/L 27 119.0 0.8 576.3 - - -
Nitrate+Nitrite
N
mg/L 22 1.5 0.5 20.0 5 22.7 10
Chloride mg/L 2 4.1 3.1 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 5 0.00 0.001 0.026 1 20.0 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 23 30.66 0.25 124.51 - - -
Chromium mg/L 2 0.0 0.002 0.005 0 0.0 0.1
Copper mg/L 25 0.01 0.01 1.78 1 4.0 1.0,1.3
Iron mg/L 26 0.2 0.0 10.4 9 34.6 0.3
Lead-1st
draw
mg/L 6 0.00 0.003 0.018 1 16.7 0.015
Lead-Running mg/L 10 0.003 0.003 0.006 0 0.0 0.015
Magnesium mg/L 20 7.39 0.05 32.77 - - -
Manganese mg/L 25 0.02 0.01 64.44 11 44.0 0.05
Mercury mg/L 7 0.05 0.000 0.100 4 57.1 0.002
Nickel mg/L 2 0.01 0.005 0.010 - - -
Sodium mg/L 3 0.01 0.01 0.06 - - -
Zinc mg/L 3 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