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Pennsylvania

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

Pennsylvania

1/4/2007 - 12/21/2016, 7,647 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
7100 0.0 0.0 2419.6 3527 49.7 0
E.
Coli
MPN/100
mL
7100 0.0 0.0 344.1 886 12.5 0
pH
-
6223 7.6 2.7 11.1 833 13.4 6.5-8.5
Total
Dissolved
Solids
mg/L 6183 183.0 10.0 4032.0 352 5.7 500
Corrosivity
Index*

-
2419 -0.5 -7.6 3.1 1583 65.4 -
Hardness mg/L 2516 90.7 0.8 1823.6 - - -
Nitrate+Nitrite
N
mg/L 2288 0.7 0.2 217.7 82 3.6 10
Chloride mg/L 1416 7.0 1.0 2196.2 20 1.4 250
Sulfate mg/L 395 14.6 3.0 1422.4 19 4.8 250
Aluminum mg/L 283 0.0 0.0 31.4 54 19.1 0.05-0.2
Arsenic mg/L 1399 0.00 0.001 0.354 74 5.3 0.01
Barium mg/L 1852 0.07 0.00 6.02 7 0.4 2
Cadmium mg/L 533 0.00 0.001 0.021 1 0.2 0.005
Calcium mg/L 2252 23.69 0.25 540.35 - - -
Chromium mg/L 533 0.0 0.001 0.007 0 0.0 0.1
Copper mg/L 2723 0.02 0.01 68.72 23 0.8 1.0,1.3
Iron mg/L 2612 0.1 0.1 95.1 425 16.3 0.3
Lead-1st
draw
mg/L 1063 0.00 0.003 0.264 165 15.5 0.015
Lead-Running mg/L 1586 0.003 0.003 2.417 49 3.1 0.015
Magnesium mg/L 2252 5.59 0.05 159.98 - - -
Manganese mg/L 2554 0.01 0.01 60.68 577 22.6 0.05
Mercury mg/L 601 0.00 0.000 0.002 0 0.0 0.002
Nickel mg/L 533 0.01 0.003 0.055 - - -
Sodium mg/L 117 6.88 0.25 77.34 - - -
Zinc mg/L 533 0.01 0.01 4.60 0 0.0 5

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