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Lancaster

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

Lancaster County

8/15/2007 - 6/16/2017, 99 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
93 0.0 0.0 200.5 45 48.4 0
E.
Coli
MPN/100
mL
93 0.0 0.0 200.5 13 14.0 0
pH
-
89 7.3 5.4 8.6 18 20.2 6.5-8.5
Total
Dissolved
Solids
mg/L 90 217.0 20.0 548.0 5 5.6 500
Corrosivity
Index*

-
33 -1.2 -5.8 0.8 25 75.8 -
Hardness mg/L 38 79.1 1.5 434.8 - - -
Nitrate+Nitrite
N
mg/L 47 6.8 0.2 18.9 12 25.5 10
Chloride mg/L 7 12.8 1.0 48.3 0 0.0 250
Sulfate mg/L 4 9.8 8.8 15.8 0 0.0 250
Aluminum mg/L 1 0.0 0.0 0.0 0 0.0 0.05-0.2
Arsenic mg/L 13 0.00 0.001 0.003 0 0.0 0.01
Barium mg/L 10 0.03 0.00 0.59 0 0.0 2
Cadmium mg/L 9 0.00 0.001 0.002 0 0.0 0.005
Calcium mg/L 32 20.95 0.50 123.33 - - -
Chromium mg/L 9 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 37 0.02 0.01 5.06 1 2.7 1.0,1.3
Iron mg/L 39 0.1 0.0 0.4 2 5.1 0.3
Lead-1st
draw
mg/L 21 0.01 0.003 0.095 8 38.1 0.015
Lead-Running mg/L 25 0.003 0.003 0.162 3 12.0 0.015
Magnesium mg/L 23 5.57 0.05 52.69 - - -
Manganese mg/L 33 0.02 0.01 20.80 13 39.4 0.05
Mercury mg/L 19 0.05 0.000 3.164 11 57.9 0.002
Nickel mg/L 7 0.01 0.005 0.010 - - -
Sodium mg/L 9 0.01 0.01 0.06 - - -
Zinc mg/L 12 0.01 0.00 0.13 0 0.0 5

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