Summary of Drinking Water Samples Tested by the Penn State Agricultural Analytical Services Laboratory
Delaware County
9/11/2007 - 6/28/2023, 208 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 |
161 | 0.0 | 0.0 | 200.5 | 49 | 30.4 | 0 |
E. Coli |
MPN/100 mL |
161 | 0.0 | 0.0 | 200.5 | 5 | 3.1 | 0 |
pH | - |
157 | 7.3 | 5.2 | 9.1 | 22 | 14.0 | 6.5-8.5 |
Total Dissolved Solids |
mg/L | 155 | 243.0 | 38.0 | 1080.0 | 8 | 5.2 | 500 |
Corrosivity Index* |
- |
87 | -1.0 | -3.5 | 1.3 | 57 | 65.5 | - |
Hardness | mg/L | 122 | 136.2 | 0.8 | 402.9 | - | - | - |
Nitrate+Nitrite N |
mg/L | 28 | 1.9 | 0.2 | 9.4 | 0 | 0.0 | 10 |
Chloride | mg/L | 14 | 20.8 | 2.0 | 315.9 | 2 | 14.3 | 250 |
Sulfate | mg/L | 7 | 33.0 | 6.3 | 70.1 | 0 | 0.0 | 250 |
Aluminum | mg/L | 4 | 0.0 | 0.0 | 0.1 | 0 | 0.0 | 0.05-0.2 |
Arsenic | mg/L | 28 | 0.00 | 0.001 | 0.009 | 0 | 0.0 | 0.01 |
Barium | mg/L | 21 | 0.06 | 0.00 | 0.31 | 0 | 0.0 | 2 |
Cadmium | mg/L | 13 | 0.00 | 0.001 | 0.002 | 0 | 0.0 | 0.005 |
Calcium | mg/L | 86 | 31.63 | 0.25 | 71.82 | - | - | - |
Chromium | mg/L | 13 | 0.0 | 0.002 | 0.005 | 0 | 0.0 | 0.1 |
Copper | mg/L | 101 | 0.02 | 0.01 | 12.72 | 2 | 2.0 | 1.0,1.3 |
Iron | mg/L | 119 | 0.1 | 0.1 | 28.8 | 11 | 9.2 | 0.3 |
Lead-1st draw |
mg/L | 78 | 0.00 | 0.003 | 0.082 | 11 | 14.1 | 0.015 |
Lead-Running | mg/L | 87 | 0.003 | 0.001 | 0.024 | 3 | 3.4 | 0.015 |
Magnesium | mg/L | 86 | 10.53 | 0.05 | 56.81 | - | - | - |
Manganese | mg/L | 120 | 0.01 | 0.01 | 7.91 | 13 | 10.8 | 0.05 |
Mercury | mg/L | 16 | 0.00 | 0.000 | 0.002 | 0 | 0.0 | 0.002 |
Nickel | mg/L | 13 | 0.01 | 0.005 | 0.017 | - | - | - |
Sodium | mg/L | 3 | 20.82 | 5.70 | 22.38 | - | - | - |
Zinc | mg/L | 13 | 0.05 | 0.011 | 4.60 | 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