Summary of Drinking Water Samples Tested by the Penn State Agricultural Analytical Services Laboratory
McKean County
9/6/2007 - 6/30/2023, 507 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 |
487 | 2.0 | 0.0 | 200.5 | 283 | 58.1 | 0 |
E. Coli |
MPN/100 mL |
487 | 0.0 | 0.0 | 200.5 | 81 | 16.6 | 0 |
pH | - |
434 | 7.3 | 3.7 | 9.0 | 80 | 18.4 | 6.5-8.5 |
Total Dissolved Solids |
mg/L | 433 | 113.0 | 19.0 | 3642.0 | 8 | 1.8 | 500 |
Corrosivity Index* |
- |
299 | -0.9 | -6.2 | 1.0 | 186 | 62.2 | - |
Hardness | mg/L | 97 | 65.4 | 0.8 | 180.5 | - | - | - |
Nitrate+Nitrite N |
mg/L | 245 | 0.5 | 0.2 | 10.5 | 1 | 0.4 | 10 |
Chloride | mg/L | 251 | 8.3 | 1.0 | 2196.2 | 5 | 2.0 | 250 |
Sulfate | mg/L | 16 | 10.0 | 3.0 | 16.3 | 0 | 0.0 | 250 |
Aluminum | mg/L | 11 | 0.1 | 0.0 | 0.3 | 7 | 63.6 | 0.05-0.2 |
Arsenic | mg/L | 243 | 0.00 | 0.001 | 0.023 | 4 | 1.6 | 0.01 |
Barium | mg/L | 257 | 0.07 | 0.00 | 6.02 | 2 | 0.8 | 2 |
Cadmium | mg/L | 8 | 0.00 | 0.001 | 0.001 | 0 | 0.0 | 0.005 |
Calcium | mg/L | 90 | 17.51 | 0.25 | 52.57 | - | - | - |
Chromium | mg/L | 8 | 0.0 | 0.001 | 0.005 | 0 | 0.0 | 0.1 |
Copper | mg/L | 100 | 0.01 | 0.01 | 5.18 | 1 | 1.0 | 1.0,1.3 |
Iron | mg/L | 97 | 0.1 | 0.1 | 22.3 | 32 | 33.0 | 0.3 |
Lead-1st draw |
mg/L | 37 | 0.00 | 0.001 | 0.052 | 4 | 10.8 | 0.015 |
Lead-Running | mg/L | 37 | 0.003 | 0.003 | 0.038 | 1 | 2.7 | 0.015 |
Magnesium | mg/L | 90 | 5.03 | 0.05 | 12.92 | - | - | - |
Manganese | mg/L | 98 | 0.04 | 0.01 | 2.41 | 46 | 46.9 | 0.05 |
Mercury | mg/L | 9 | 0.00 | 0.001 | 0.001 | 0 | 0.0 | 0.002 |
Nickel | mg/L | 8 | 0.01 | 0.005 | 0.005 | - | - | - |
Sodium | mg/L | 5 | 6.64 | 0.55 | 22.95 | - | - | - |
Zinc | mg/L | 8 | 0.01 | 0.005 | 0.02 | 0 | 0.0 | 5 |
*For corrosivity index, failure criteria based on less than -0.5 or greater than 0.5
Ag Analytical Services Lab
Hours: Monday-Friday, 8:00 AM - 4:00 PM
- Email aaslab@psu.edu
- Office 814-863-0841
- Fax 814-863-4540
Ag Analytical Services Lab
Hours: Monday-Friday, 8:00 AM - 4:00 PM
- Email aaslab@psu.edu
- Office 814-863-0841
- Fax 814-863-4540