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

Centre County

6/20/2007 - 7/5/2022, 2,036 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
1833 0.0 0.0 2419.6 796 43.4 0
E.
Coli
MPN/100
mL
1833 0.0 0.0 344.1 238 13.0 0
pH
-
1190 7.7 4.8 10.3 117 9.8 6.5-8.5
Total
Dissolved
Solids
mg/L 1166 234.0 20.0 2735.0 51 4.4 500
Corrosivity
Index*

-
540 0.2 -5.5 2.1 336 62.2 -
Hardness mg/L 634 120.8 0.8 1777.9 - - -
Nitrate+Nitrite
N
mg/L 523 1.5 0.2 33.2 22 4.2 10
Chloride mg/L 82 6.5 1.0 226.3 0 0.0 250
Sulfate mg/L 109 13.6 1.0 387.3 1 0.9 250
Aluminum mg/L 50 0.0 0.0 5.2 8 16.0 0.05-0.2
Arsenic mg/L 216 0.00 0.001 0.071 19 8.8 0.01
Barium mg/L 125 0.03 0.00 0.77 0 0.0 2
Cadmium mg/L 58 0.00 0.001 0.043 2 3.4 0.005
Calcium mg/L 530 25.97 0.25 540.35 - - -
Chromium mg/L 58 0.0 0.001 0.005 0 0.0 0.1
Copper mg/L 578 0.02 0.01 68.72 6 1.0 1.0,1.3
Iron mg/L 588 0.1 0.0 95.1 102 17.3 0.3
Lead-1st
draw
mg/L 246 0.00 0.003 0.108 23 9.3 0.015
Lead-Running mg/L 376 0.003 0.003 0.307 12 3.2 0.015
Magnesium mg/L 422 6.34 0.05 104.09 - - -
Manganese mg/L 583 0.01 0.01 38.91 182 31.2 0.05
Mercury mg/L 184 0.05 0.000 3.130 117 63.6 0.002
Nickel mg/L 54 0.01 0.005 0.115 - - -
Sodium mg/L 115 0.01 0.01 3.66 - - -
Zinc mg/L 157 0.00 0.00 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

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