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Lawrence

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

Lawrence County

12/12/2007 - 6/10/2016, 33 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
32 2.0 0.0 200.5 17 53.1 0
E.
Coli
MPN/100
mL
32 0.0 0.0 200.5 5 15.6 0
pH
-
29 7.6 6.5 8.4 1 3.4 6.5-8.5
Total
Dissolved
Solids
mg/L 29 322.0 142.0 883.0 6 20.7 500
Corrosivity
Index*

-
9 0.3 -2.2 1.0 6 66.7 -
Hardness mg/L 9 274.6 0.8 693.0 - - -
Nitrate+Nitrite
N
mg/L 7 0.5 0.5 10.3 1 14.3 10
Chloride mg/L 7 9.0 5.0 77.0 0 0.0 250
Sulfate mg/L 1 30.5 30.5 30.5 0 0.0 250
Aluminum mg/L 2 0.1 0.1 0.1 1 50.0 0.05-0.2
Arsenic mg/L 8 0.00 0.001 0.003 0 0.0 0.01
Barium mg/L 9 0.06 0.00 0.11 0 0.0 2
Cadmium mg/L 3 0.00 0.001 0.002 0 0.0 0.005
Calcium mg/L 9 86.63 0.25 192.02 - - -
Chromium mg/L 3 0.0 0.005 0.005 0 0.0 0.1
Copper mg/L 12 0.01 0.01 0.04 0 0.0 1.0,1.3
Iron mg/L 10 0.2 0.1 3.8 4 40.0 0.3
Lead-1st
draw
mg/L 3 0.00 0.003 0.026 1 33.3 0.015
Lead-Running mg/L 7 0.003 0.003 0.006 0 0.0 0.015
Magnesium mg/L 9 15.37 0.05 52.21 - - -
Manganese mg/L 10 0.11 0.01 1.46 6 60.0 0.05
Mercury mg/L 3 0.00 0.000 0.001 0 0.0 0.002
Nickel mg/L 3 0.01 0.005 0.005 - - -
Sodium mg/L 0 - - - - - -
Zinc mg/L 3 0.01 0.01 0.07 0 0.0 5

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