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

Armstrong County

11/15/2007 - 6/23/2020, 89 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
87 36.4 0.0 200.5 66 75.9 0
E.
Coli
MPN/100
mL
87 0.0 0.0 200.5 23 26.4 0
pH
-
72 7.4 5.4 8.7 15 20.8 6.5-8.5
Total
Dissolved
Solids
mg/L 72 182.5 20.0 1850.0 8 11.1 500
Corrosivity
Index*

-
23 -0.6 -2.8 0.8 16 69.6 -
Hardness mg/L 26 100.2 1.7 607.4 - - -
Nitrate+Nitrite
N
mg/L 28 0.6 0.2 6.8 0 0.0 10
Chloride mg/L 20 9.9 2.0 349.9 1 5.0 250
Sulfate mg/L 8 37.6 3.0 506.9 1 12.5 250
Aluminum mg/L 8 0.1 0.0 1.0 4 50.0 0.05-0.2
Arsenic mg/L 7 0.00 0.003 0.010 0 0.0 0.01
Barium mg/L 27 0.07 0.01 1.46 0 0.0 2
Cadmium mg/L 4 0.00 0.001 0.002 0 0.0 0.005
Calcium mg/L 23 24.65 0.50 105.73 - - -
Chromium mg/L 4 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 28 0.01 0.01 0.23 0 0.0 1.0,1.3
Iron mg/L 25 0.2 0.1 2.5 6 24.0 0.3
Lead-1st
draw
mg/L 17 0.00 0.003 0.019 1 5.9 0.015
Lead-Running mg/L 12 0.003 0.003 0.006 0 0.0 0.015
Magnesium mg/L 23 6.74 0.10 15.27 - - -
Manganese mg/L 28 0.01 0.01 6.59 9 32.1 0.05
Mercury mg/L 4 0.00 0.001 0.001 0 0.0 0.002
Nickel mg/L 4 0.01 0.003 0.005 - - -
Sodium mg/L 0 - - - - - -
Zinc mg/L 4 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

Ag Analytical Services Lab

Address

111 Ag Analytical Srvcs Lab
University Park, PA 16802
Directions

Hours: Monday-Friday, 8:00 AM - 4:30 PM

Ag Analytical Services Lab

Address

111 Ag Analytical Srvcs Lab
University Park, PA 16802
Directions

Hours: Monday-Friday, 8:00 AM - 4:30 PM