Centre

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

Centre County

6/20/2007 - 7/1/2024, 2,716 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		 2181 0.0 0.0 2419.6 951 43.6 0
E.
Coli		 MPN/100
mL		 2181 0.0 0.0 344.1 270 12.4 0
pH
-		 1392 7.6 4.1 10.3 146 10.5 6.5-8.5
Total
Dissolved
Solids		 mg/L 1382 237.0 20.0 2735.0 66 4.8 500
Corrosivity
Index*
-		 628 0.1 -5.7 2.1 381 60.7 -
Hardness mg/L 803 118.1 0.8 1777.9 - - -
Nitrate+Nitrite
N		 mg/L 751 1.7 0.2 33.2 31 4.1 10
Chloride mg/L 174 9.7 1.0 333.2 2 1.1 250
Sulfate mg/L 219 14.4 1.0 1270.1 3 1.4 250
Aluminum mg/L 59 0.0 0.0 5.2 10 16.9 0.05-0.2
Arsenic mg/L 292 0.00 0.001 0.071 26 8.9 0.01
Barium mg/L 169 0.03 0.00 0.77 0 0.0 2
Cadmium mg/L 68 0.00 0.001 0.043 2 2.9 0.005
Calcium mg/L 616 25.84 0.25 540.35 - - -
Chromium mg/L 68 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 721 0.02 0.01 68.72 8 1.1 1.0,1.3
Iron mg/L 774 0.1 0.1 95.1 128 16.5 0.3
Lead-1st
draw		 mg/L 543 0.00 0.003 0.315 39 7.2 0.015
Lead-Running mg/L 487 0.003 0.003 0.307 16 3.3 0.015
Magnesium mg/L 616 7.39 0.05 104.09 - - -
Manganese mg/L 698 0.01 0.01 7.34 112 16.0 0.05
Mercury mg/L 74 0.00 0.000 0.002 0 0.0 0.002
Nickel mg/L 68 0.01 0.005 0.115 - - -
Sodium mg/L 18 12.46 0.40 233.12 - - -
Zinc mg/L 68 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