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Northumberland

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

Northumberland County

8/27/2007 - 6/22/2018, 76 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
70 0.0 0.0 200.5 32 45.7 0
E.
Coli
MPN/100
mL
70 0.0 0.0 200.5 11 15.7 0
pH
-
54 7.7 5.8 10.3 9 16.7 6.5-8.5
Total
Dissolved
Solids
mg/L 53 165.0 49.0 456.0 0 0.0 500
Corrosivity
Index*

-
22 -0.1 -2.7 0.8 10 45.5 -
Hardness mg/L 25 125.0 30.9 370.4 - - -
Nitrate+Nitrite
N
mg/L 26 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 8 0.00 0.001 0.032 1 12.5 0.01
Barium mg/L 2 0.03 0.01 0.05 0 0.0 2
Cadmium mg/L 2 0.00 0.001 0.001 0 0.0 0.005
Calcium mg/L 21 33.98 8.36 72.51 - - -
Chromium mg/L 2 0.0 0.005 0.005 0 0.0 0.1
Copper mg/L 21 0.06 0.01 1.19 0 0.0 1.0,1.3
Iron mg/L 30 0.1 0.0 2.0 6 20.0 0.3
Lead-1st
draw
mg/L 6 0.00 0.003 0.005 0 0.0 0.015
Lead-Running mg/L 10 0.003 0.003 0.823 1 10.0 0.015
Magnesium mg/L 17 6.05 1.88 30.30 - - -
Manganese mg/L 25 0.01 0.01 45.07 8 32.0 0.05
Mercury mg/L 6 0.07 0.001 0.100 5 83.3 0.002
Nickel mg/L 1 0.01 0.005 0.005 - - -
Sodium mg/L 4 0.01 0.01 0.01 - - -
Zinc mg/L 8 0.00 0.00 0.01 0 0.0 5

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