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Pennsylvania

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

Pennsylvania

1/4/2007 - 7/12/2017, 9,015 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
8390 0.0 0.0 2419.6 4190 49.9 0
E.
Coli
MPN/100
mL
8390 0.0 0.0 344.1 1112 13.3 0
pH
-
7355 7.5 2.7 11.1 1033 14.0 6.5-8.5
Total
Dissolved
Solids
mg/L 7313 184.0 10.0 4032.0 418 5.7 500
Corrosivity
Index*

-
3124 -0.6 -7.6 3.1 2083 66.7 -
Hardness mg/L 3249 87.8 0.8 1823.6 - - -
Nitrate+Nitrite
N
mg/L 2922 0.7 0.2 217.7 90 3.1 10
Chloride mg/L 1483 7.0 1.0 2196.2 25 1.7 250
Sulfate mg/L 437 15.1 1.0 1422.4 24 5.5 250
Aluminum mg/L 309 0.0 0.0 31.4 57 18.4 0.05-0.2
Arsenic mg/L 1905 0.00 0.001 0.354 102 5.4 0.01
Barium mg/L 2311 0.06 0.00 6.02 9 0.4 2
Cadmium mg/L 589 0.00 0.001 0.028 2 0.3 0.005
Calcium mg/L 2960 22.28 0.25 540.35 - - -
Chromium mg/L 589 0.0 0.001 0.007 0 0.0 0.1
Copper mg/L 3361 0.02 0.01 68.72 72 2.1 1.0,1.3
Iron mg/L 3205 0.1 0.0 95.1 453 14.1 0.3
Lead-1st
draw
mg/L 1309 0.00 0.003 0.264 192 14.7 0.015
Lead-Running mg/L 2224 0.003 0.003 2.417 100 4.5 0.015
Magnesium mg/L 2440 5.42 0.05 159.98 - - -
Manganese mg/L 3074 0.01 0.01 81.58 1040 33.8 0.05
Mercury mg/L 972 0.00 0.000 47.368 371 38.2 0.002
Nickel mg/L 533 0.01 0.003 0.055 - - -
Sodium mg/L 492 0.02 0.01 77.34 - - -
Zinc mg/L 980 0.01 0.00 4.60 0 0.0 5

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