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Philadelphia

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

Philadelphia County

2/6/2008 - 3/12/2018, 69 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
60 0.0 0.0 253.8 29 48.3 0
E.
Coli
MPN/100
mL
60 0.0 0.0 200.5 15 25.0 0
pH
-
46 7.3 5.9 7.8 2 4.3 6.5-8.5
Total
Dissolved
Solids
mg/L 45 225.0 20.0 678.0 1 2.2 500
Corrosivity
Index*

-
18 -0.9 -2.7 -0.1 12 66.7 -
Hardness mg/L 19 115.4 0.8 190.3 - - -
Nitrate+Nitrite
N
mg/L 5 2.4 0.2 3.7 0 0.0 10
Chloride mg/L 6 59.5 3.2 115.9 0 0.0 250
Sulfate mg/L 1 52.6 52.6 52.6 0 0.0 250
Aluminum mg/L 0 - - - - - 0.05-0.2
Arsenic mg/L 21 0.00 0.003 0.003 0 0.0 0.01
Barium mg/L 21 0.04 0.00 0.15 0 0.0 2
Cadmium mg/L 21 0.00 0.001 0.001 0 0.0 0.005
Calcium mg/L 18 32.99 0.25 48.72 - - -
Chromium mg/L 21 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 28 0.09 0.01 1.09 0 0.0 1.0,1.3
Iron mg/L 33 0.1 0.0 0.5 2 6.1 0.3
Lead-1st
draw
mg/L 20 0.01 0.003 0.008 0 0.0 0.015
Lead-Running mg/L 29 0.003 0.003 0.017 1 3.4 0.015
Magnesium mg/L 3 8.78 6.33 9.47 - - -
Manganese mg/L 19 6.54 0.01 16.66 14 73.7 0.05
Mercury mg/L 22 0.05 0.001 0.132 15 68.2 0.002
Nickel mg/L 7 0.01 0.005 0.008 - - -
Sodium mg/L 15 0.01 0.01 0.02 - - -
Zinc mg/L 37 0.00 0.00 0.14 0 0.0 5

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