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

Armstrong County

11/15/2007 - 7/6/2021, 99 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
97 36.4 0.0 200.5 73 75.3 0
E.
Coli
MPN/100
mL
97 0.0 0.0 200.5 25 25.8 0
pH
-
81 7.4 5.4 8.7 15 18.5 6.5-8.5
Total
Dissolved
Solids
mg/L 81 182.0 20.0 1850.0 8 9.9 500
Corrosivity
Index*

-
26 -0.5 -2.8 0.8 18 69.2 -
Hardness mg/L 29 98.2 1.7 607.4 - - -
Nitrate+Nitrite
N
mg/L 29 0.6 0.2 6.8 0 0.0 10
Chloride mg/L 23 6.5 2.0 349.9 1 4.3 250
Sulfate mg/L 10 37.6 3.0 506.9 1 10.0 250
Aluminum mg/L 10 0.0 0.0 1.0 4 40.0 0.05-0.2
Arsenic mg/L 8 0.00 0.003 0.010 0 0.0 0.01
Barium mg/L 30 0.06 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 25 22.69 0.50 105.73 - - -
Chromium mg/L 4 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 30 0.01 0.01 0.23 0 0.0 1.0,1.3
Iron mg/L 27 0.2 0.1 2.5 7 25.9 0.3
Lead-1st
draw
mg/L 18 0.00 0.003 0.019 1 5.6 0.015
Lead-Running mg/L 13 0.003 0.003 0.006 0 0.0 0.015
Magnesium mg/L 25 6.61 0.10 15.27 - - -
Manganese mg/L 32 0.01 0.01 6.59 11 34.4 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