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

York County

8/9/2007 - 7/7/2021, 490 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
472 0.0 0.0 2419.6 228 48.3 0
E.
Coli
MPN/100
mL
472 0.0 0.0 200.5 40 8.5 0
pH
-
447 6.7 4.7 9.8 176 39.4 6.5-8.5
Total
Dissolved
Solids
mg/L 447 139.0 20.0 1020.0 6 1.3 500
Corrosivity
Index*

-
184 -1.6 -5.4 0.8 142 77.2 -
Hardness mg/L 198 70.7 0.8 459.7 - - -
Nitrate+Nitrite
N
mg/L 239 4.6 0.2 33.1 24 10.0 10
Chloride mg/L 14 11.0 5.0 320.0 1 7.1 250
Sulfate mg/L 14 12.9 3.9 35.0 0 0.0 250
Aluminum mg/L 10 0.0 0.0 0.1 1 10.0 0.05-0.2
Arsenic mg/L 95 0.00 0.001 0.013 1 1.1 0.01
Barium mg/L 53 0.04 0.00 0.60 0 0.0 2
Cadmium mg/L 33 0.00 0.001 0.002 0 0.0 0.005
Calcium mg/L 184 16.30 0.25 135.71 - - -
Chromium mg/L 33 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 222 0.03 0.01 7.72 3 1.4 1.0,1.3
Iron mg/L 181 0.1 0.1 25.0 20 11.0 0.3
Lead-1st
draw
mg/L 112 0.01 0.003 0.201 27 24.1 0.015
Lead-Running mg/L 162 0.003 0.003 0.844 11 6.8 0.015
Magnesium mg/L 184 6.01 0.05 45.59 - - -
Manganese mg/L 179 0.01 0.01 3.92 29 16.2 0.05
Mercury mg/L 44 0.00 0.000 0.001 0 0.0 0.002
Nickel mg/L 33 0.01 0.005 0.229 - - -
Sodium mg/L 0 - - - - - -
Zinc mg/L 33 0.03 0.01 0.22 0 0.0 5

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

Ag Analytical Services Lab

Address

111 Ag Analytical Srvcs Lab
University Park, PA 16802
Directions

Hours: Monday-Friday, 8:00 AM - 4:30 PM

Ag Analytical Services Lab

Address

111 Ag Analytical Srvcs Lab
University Park, PA 16802
Directions

Hours: Monday-Friday, 8:00 AM - 4:30 PM