Centre

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

Centre County

6/20/2007 - 6/27/2025, 3,046 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		 2400 0.0 0.0 2419.6 1036 43.2 0
E.
Coli		 MPN/100
mL		 2400 0.0 0.0 344.1 291 12.1 0
pH
-		 1511 7.6 4.1 10.3 166 11.0 6.5-8.5
Total
Dissolved
Solids		 mg/L 1509 236.0 20.0 2735.0 72 4.8 500
Corrosivity
Index*
-		 696 -0.0 -5.7 2.1 421 60.5 -
Hardness mg/L 902 115.1 0.8 1777.9 - - -
Nitrate+Nitrite
N		 mg/L 871 1.6 0.2 33.2 32 3.7 10
Chloride mg/L 226 9.4 1.0 333.2 2 0.9 250
Sulfate mg/L 277 14.5 1.0 1270.1 4 1.4 250
Aluminum mg/L 63 0.0 0.0 5.2 10 15.9 0.05-0.2
Arsenic mg/L 332 0.00 0.001 0.071 27 8.1 0.01
Barium mg/L 199 0.03 0.00 2.90 1 0.5 2
Cadmium mg/L 71 0.00 0.001 0.043 2 2.8 0.005
Calcium mg/L 683 25.62 0.25 540.35 - - -
Chromium mg/L 71 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 796 0.02 0.01 68.72 9 1.1 1.0,1.3
Iron mg/L 885 0.1 0.1 122.6 145 16.4 0.3
Lead-1st
draw		 mg/L 633 0.00 0.003 1.300 43 6.8 0.015
Lead-Running mg/L 537 0.003 0.003 0.307 19 3.5 0.015
Magnesium mg/L 683 7.41 0.05 104.09 - - -
Manganese mg/L 774 0.01 0.01 7.34 128 16.5 0.05
Mercury mg/L 74 0.00 0.000 0.002 0 0.0 0.002
Nickel mg/L 71 0.01 0.005 0.115 - - -
Sodium mg/L 50 8.40 0.25 233.12 - - -
Zinc mg/L 71 0.01 0.005 0.36 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