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Lawrence

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

Lawrence County

12/12/2007 - 3/10/2017, 39 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
38 0.0 0.0 200.5 18 47.4 0
E.
Coli
MPN/100
mL
38 0.0 0.0 200.5 6 15.8 0
pH
-
35 7.6 6.5 8.4 1 2.9 6.5-8.5
Total
Dissolved
Solids
mg/L 35 286.0 142.0 883.0 6 17.1 500
Corrosivity
Index*

-
12 0.0 -2.2 1.0 8 66.7 -
Hardness mg/L 12 234.7 0.8 693.0 - - -
Nitrate+Nitrite
N
mg/L 9 0.5 0.2 10.3 1 11.1 10
Chloride mg/L 8 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 10 0.00 0.001 0.003 0 0.0 0.01
Barium mg/L 12 0.05 0.00 0.17 0 0.0 2
Cadmium mg/L 3 0.00 0.001 0.002 0 0.0 0.005
Calcium mg/L 12 68.87 0.25 192.02 - - -
Chromium mg/L 3 0.0 0.005 0.005 0 0.0 0.1
Copper mg/L 15 0.01 0.01 0.71 0 0.0 1.0,1.3
Iron mg/L 12 0.2 0.0 3.8 4 33.3 0.3
Lead-1st
draw
mg/L 4 0.02 0.003 0.036 2 50.0 0.015
Lead-Running mg/L 10 0.003 0.003 0.036 1 10.0 0.015
Magnesium mg/L 10 14.62 0.05 52.21 - - -
Manganese mg/L 12 0.11 0.01 9.41 7 58.3 0.05
Mercury mg/L 4 0.00 0.000 0.050 1 25.0 0.002
Nickel mg/L 3 0.01 0.005 0.005 - - -
Sodium mg/L 1 0.01 0.01 0.01 - - -
Zinc mg/L 5 0.01 0.00 0.07 0 0.0 5

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