Montgomery

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

Montgomery County

9/11/2007 - 6/24/2025, 571 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		 519 0.0 0.0 276.2 185 35.6 0
E.
Coli		 MPN/100
mL		 519 0.0 0.0 200.5 25 4.8 0
pH
-		 491 7.6 5.3 9.1 34 6.9 6.5-8.5
Total
Dissolved
Solids		 mg/L 492 306.0 20.0 1146.0 47 9.6 500
Corrosivity
Index*
-		 229 -0.0 -5.0 1.1 130 56.8 -
Hardness mg/L 244 187.9 0.8 846.1 - - -
Nitrate+Nitrite
N		 mg/L 168 2.8 0.2 13.4 1 0.6 10
Chloride mg/L 53 74.9 1.7 333.9 2 3.8 250
Sulfate mg/L 54 20.7 1.0 184.8 0 0.0 250
Aluminum mg/L 17 0.0 0.0 0.1 0 0.0 0.05-0.2
Arsenic mg/L 162 0.00 0.001 0.109 20 12.3 0.01
Barium mg/L 118 0.05 0.00 0.92 0 0.0 2
Cadmium mg/L 72 0.00 0.001 0.002 0 0.0 0.005
Calcium mg/L 225 48.94 0.25 226.38 - - -
Chromium mg/L 72 0.0 0.001 0.006 0 0.0 0.1
Copper mg/L 302 0.02 0.01 1.49 1 0.3 1.0,1.3
Iron mg/L 241 0.1 0.1 4.6 16 6.6 0.3
Lead-1st
draw		 mg/L 168 0.00 0.003 0.079 16 9.5 0.015
Lead-Running mg/L 217 0.003 0.003 0.099 6 2.8 0.015
Magnesium mg/L 225 13.99 0.05 68.21 - - -
Manganese mg/L 238 0.01 0.01 2.86 10 4.2 0.05
Mercury mg/L 77 0.00 0.000 0.001 0 0.0 0.002
Nickel mg/L 72 0.01 0.005 0.026 - - -
Sodium mg/L 29 19.66 3.17 205.65 - - -
Zinc mg/L 72 0.01 0.005 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

720 Tower Rd
University Park, PA 16802
Directions

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

Ag Analytical Services Lab

Address

720 Tower Rd
University Park, PA 16802
Directions

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