Pennsylvania

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

Pennsylvania

1/4/2007 - 6/27/2025, 24,726 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		 22730 0.0 0.0 2419.6 10021 44.1 0
E.
Coli		 MPN/100
mL		 22730 0.0 0.0 1046.2 2401 10.6 0
pH
-		 18062 7.4 2.7 11.4 3004 16.6 6.5-8.5
Total
Dissolved
Solids		 mg/L 17769 189.0 10.0 9220.0 1004 5.7 500
Corrosivity
Index*
-		 7676 -0.8 -7.6 3.1 5059 65.9 -
Hardness mg/L 8244 85.4 0.8 1823.6 - - -
Nitrate+Nitrite
N		 mg/L 8840 0.9 0.2 217.7 364 4.1 10
Chloride mg/L 3000 9.0 1.0 3965.5 65 2.2 250
Sulfate mg/L 1960 14.2 1.0 1636.6 47 2.4 250
Aluminum mg/L 770 0.0 0.0 37.7 132 17.1 0.05-0.2
Arsenic mg/L 5555 0.00 0.001 0.354 303 5.5 0.01
Barium mg/L 4668 0.05 0.00 28.37 21 0.4 2
Cadmium mg/L 1284 0.00 0.001 0.043 4 0.3 0.005
Calcium mg/L 7446 21.72 0.25 540.35 - - -
Chromium mg/L 1284 0.0 0.001 0.050 0 0.0 0.1
Copper mg/L 8923 0.01 0.01 68.72 82 0.9 1.0,1.3
Iron mg/L 7683 0.1 0.1 225.3 1323 17.2 0.3
Lead-1st
draw		 mg/L 6163 0.00 0.003 2.039 551 8.9 0.015
Lead-Running mg/L 6379 0.003 0.003 4.590 201 3.2 0.015
Magnesium mg/L 7444 5.63 0.05 159.98 - - -
Manganese mg/L 7691 0.01 0.01 60.68 1716 22.3 0.05
Mercury mg/L 1308 0.00 0.000 0.002 0 0.0 0.002
Nickel mg/L 1286 0.01 0.003 0.240 - - -
Sodium mg/L 1088 14.37 0.25 2039.85 - - -
Zinc mg/L 1284 0.01 0.005 18.70 2 0.2 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