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York

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

York County

8/9/2007 - 6/12/2017, 301 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
293 1.0 0.0 200.5 147 50.2 0
E.
Coli
MPN/100
mL
293 0.0 0.0 200.5 26 8.9 0
pH
-
275 6.7 4.7 9.8 106 38.5 6.5-8.5
Total
Dissolved
Solids
mg/L 275 136.0 20.0 645.0 2 0.7 500
Corrosivity
Index*

-
104 -1.7 -4.2 0.8 79 76.0 -
Hardness mg/L 110 70.7 0.8 364.2 - - -
Nitrate+Nitrite
N
mg/L 146 4.8 0.2 33.1 13 8.9 10
Chloride mg/L 9 7.5 5.0 36.6 0 0.0 250
Sulfate mg/L 10 11.2 5.7 30.5 0 0.0 250
Aluminum mg/L 9 0.0 0.0 0.1 1 11.1 0.05-0.2
Arsenic mg/L 61 0.00 0.001 0.008 0 0.0 0.01
Barium mg/L 27 0.04 0.00 0.60 0 0.0 2
Cadmium mg/L 17 0.00 0.001 0.002 0 0.0 0.005
Calcium mg/L 105 13.82 0.25 82.23 - - -
Chromium mg/L 17 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 120 0.04 0.01 4.36 5 4.2 1.0,1.3
Iron mg/L 109 0.1 0.0 25.0 9 8.3 0.3
Lead-1st
draw
mg/L 49 0.01 0.003 0.095 15 30.6 0.015
Lead-Running mg/L 96 0.003 0.003 0.500 9 9.4 0.015
Magnesium mg/L 92 5.49 0.05 45.59 - - -
Manganese mg/L 107 0.01 0.01 13.34 33 30.8 0.05
Mercury mg/L 33 0.00 0.000 0.278 13 39.4 0.002
Nickel mg/L 15 0.01 0.005 0.022 - - -
Sodium mg/L 13 0.01 0.01 0.25 - - -
Zinc mg/L 25 0.01 0.00 0.38 0 0.0 5

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