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

Montgomery County

9/11/2007 - 6/30/2020, 317 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
288 0.0 0.0 200.5 110 38.2 0
E.
Coli
MPN/100
mL
288 0.0 0.0 200.5 17 5.9 0
pH
-
282 7.7 5.8 9.1 14 5.0 6.5-8.5
Total
Dissolved
Solids
mg/L 282 297.0 43.0 1146.0 27 9.6 500
Corrosivity
Index*

-
121 0.2 -3.5 1.0 69 57.0 -
Hardness mg/L 129 190.2 0.8 846.1 - - -
Nitrate+Nitrite
N
mg/L 85 2.9 0.2 13.4 1 1.2 10
Chloride mg/L 15 39.4 6.7 208.1 0 0.0 250
Sulfate mg/L 14 24.9 2.1 48.3 0 0.0 250
Aluminum mg/L 6 0.0 0.0 0.1 0 0.0 0.05-0.2
Arsenic mg/L 70 0.00 0.001 0.109 8 11.4 0.01
Barium mg/L 55 0.06 0.00 0.57 0 0.0 2
Cadmium mg/L 45 0.00 0.001 0.002 0 0.0 0.005
Calcium mg/L 119 49.04 0.25 226.38 - - -
Chromium mg/L 45 0.0 0.001 0.006 0 0.0 0.1
Copper mg/L 166 0.03 0.01 1.49 1 0.6 1.0,1.3
Iron mg/L 126 0.1 0.1 4.6 12 9.5 0.3
Lead-1st
draw
mg/L 82 0.00 0.003 0.079 12 14.6 0.015
Lead-Running mg/L 117 0.003 0.003 0.073 3 2.6 0.015
Magnesium mg/L 119 13.78 0.05 68.21 - - -
Manganese mg/L 123 0.01 0.01 2.86 6 4.9 0.05
Mercury mg/L 57 0.00 0.000 0.001 0 0.0 0.002
Nickel mg/L 45 0.01 0.005 0.019 - - -
Sodium mg/L 1 17.39 17.39 17.39 - - -
Zinc mg/L 45 0.02 0.01 1.21 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