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Lancaster

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

Lancaster County

8/15/2007 - 4/22/2016, 72 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
69 0.0 0.0 200.5 34 49.3 0
E.
Coli
MPN/100
mL
69 0.0 0.0 200.5 12 17.4 0
pH
-
67 7.3 5.4 8.4 13 19.4 6.5-8.5
Total
Dissolved
Solids
mg/L 67 222.0 20.0 548.0 4 6.0 500
Corrosivity
Index*

-
24 -1.6 -4.7 0.8 19 79.2 -
Hardness mg/L 25 80.0 1.5 434.8 - - -
Nitrate+Nitrite
N
mg/L 39 6.9 0.2 18.9 11 28.2 10
Chloride mg/L 0 - - - - - 250
Sulfate mg/L 2 9.4 8.8 10.0 0 0.0 250
Aluminum mg/L 1 0.0 0.0 0.0 0 0.0 0.05-0.2
Arsenic mg/L 9 0.00 0.001 0.003 0 0.0 0.01
Barium mg/L 7 0.05 0.00 0.13 0 0.0 2
Cadmium mg/L 7 0.00 0.001 0.002 0 0.0 0.005
Calcium mg/L 23 24.28 0.50 123.33 - - -
Chromium mg/L 7 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 32 0.02 0.01 0.35 0 0.0 1.0,1.3
Iron mg/L 25 0.1 0.1 0.3 1 4.0 0.3
Lead-1st
draw
mg/L 19 0.01 0.003 0.095 8 42.1 0.015
Lead-Running mg/L 20 0.003 0.003 0.162 2 10.0 0.015
Magnesium mg/L 23 5.57 0.05 52.69 - - -
Manganese mg/L 24 0.01 0.01 0.11 4 16.7 0.05
Mercury mg/L 8 0.00 0.000 0.002 0 0.0 0.002
Nickel mg/L 7 0.01 0.005 0.010 - - -
Sodium mg/L 0 - - - - - -
Zinc mg/L 7 0.01 0.01 0.12 0 0.0 5

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