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Pennsylvania

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

Pennsylvania

1/4/2007 - 7/9/2018, 10,378 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
9673 0.0 0.0 2419.6 4785 49.5 0
E.
Coli
MPN/100
mL
9673 0.0 0.0 517.2 1259 13.0 0
pH
-
8408 7.5 2.7 11.1 1188 14.1 6.5-8.5
Total
Dissolved
Solids
mg/L 8360 185.0 10.0 4032.0 482 5.8 500
Corrosivity
Index*

-
3671 -0.6 -7.6 3.1 2454 66.8 -
Hardness mg/L 3830 87.3 0.8 1823.6 - - -
Nitrate+Nitrite
N
mg/L 3455 0.7 0.2 217.7 121 3.5 10
Chloride mg/L 1556 7.3 1.0 2196.2 32 2.1 250
Sulfate mg/L 499 15.7 1.0 1422.4 29 5.8 250
Aluminum mg/L 345 0.0 0.0 31.4 62 18.0 0.05-0.2
Arsenic mg/L 2268 0.00 0.001 0.354 125 5.5 0.01
Barium mg/L 2660 0.06 0.00 6.02 10 0.4 2
Cadmium mg/L 684 0.00 0.001 0.028 2 0.3 0.005
Calcium mg/L 3503 22.05 0.25 540.35 - - -
Chromium mg/L 684 0.0 0.001 0.007 0 0.0 0.1
Copper mg/L 3780 0.02 0.01 68.72 113 3.0 1.0,1.3
Iron mg/L 3851 0.1 0.0 95.1 497 12.9 0.3
Lead-1st
draw
mg/L 1404 0.01 0.003 0.264 195 13.9 0.015
Lead-Running mg/L 2643 0.003 0.003 2.417 139 5.3 0.015
Magnesium mg/L 2440 5.42 0.05 159.98 - - -
Manganese mg/L 3617 0.02 0.01 96.30 1504 41.6 0.05
Mercury mg/L 1368 0.05 0.000 52.267 767 56.1 0.002
Nickel mg/L 533 0.01 0.003 0.055 - - -
Sodium mg/L 886 0.01 0.01 77.34 - - -
Zinc mg/L 1511 0.00 0.00 4.60 0 0.0 5

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