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Northumberland

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

Northumberland County

8/27/2007 - 6/21/2016, 56 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
53 0.0 0.0 200.5 26 49.1 0
E.
Coli
MPN/100
mL
53 0.0 0.0 200.5 9 17.0 0
pH
-
45 7.7 5.8 10.3 9 20.0 6.5-8.5
Total
Dissolved
Solids
mg/L 44 164.5 49.0 456.0 0 0.0 500
Corrosivity
Index*

-
18 -0.2 -2.7 0.8 8 44.4 -
Hardness mg/L 21 121.2 46.2 370.4 - - -
Nitrate+Nitrite
N
mg/L 19 1.0 0.2 9.6 0 0.0 10
Chloride mg/L 0 - - - - - 250
Sulfate mg/L 3 8.2 3.1 39.5 0 0.0 250
Aluminum mg/L 0 - - - - - 0.05-0.2
Arsenic mg/L 7 0.00 0.001 0.032 1 14.3 0.01
Barium mg/L 1 0.05 0.05 0.05 0 0.0 2
Cadmium mg/L 1 0.00 0.001 0.001 0 0.0 0.005
Calcium mg/L 17 32.08 9.77 69.25 - - -
Chromium mg/L 1 0.0 0.005 0.005 0 0.0 0.1
Copper mg/L 18 0.03 0.01 0.13 0 0.0 1.0,1.3
Iron mg/L 24 0.1 0.1 2.0 4 16.7 0.3
Lead-1st
draw
mg/L 5 0.00 0.003 0.003 0 0.0 0.015
Lead-Running mg/L 7 0.003 0.003 0.004 0 0.0 0.015
Magnesium mg/L 17 6.05 1.88 30.30 - - -
Manganese mg/L 21 0.01 0.01 0.26 4 19.0 0.05
Mercury mg/L 1 0.00 0.001 0.001 0 0.0 0.002
Nickel mg/L 1 0.01 0.005 0.005 - - -
Sodium mg/L 0 - - - - - -
Zinc mg/L 1 0.01 0.01 0.01 0 0.0 5

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