Lehigh
Summary of Drinking Water Samples Tested by the Penn State Agricultural Analytical Services Laboratory
Lehigh County
9/13/2007 - 6/29/2018, 146 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 |
137 | 0.0 | 0.0 | 200.5 | 51 | 37.2 | 0 |
| E. Coli |
MPN/100 mL |
137 | 0.0 | 0.0 | 11.1 | 4 | 2.9 | 0 |
| pH | - |
122 | 7.4 | 5.9 | 8.9 | 15 | 12.3 | 6.5-8.5 |
| Total Dissolved Solids |
mg/L | 122 | 181.0 | 46.0 | 668.0 | 3 | 2.5 | 500 |
| Corrosivity Index* |
- |
58 | -0.8 | -4.6 | 1.3 | 37 | 63.8 | - |
| Hardness | mg/L | 61 | 107.9 | 0.8 | 283.4 | - | - | - |
| Nitrate+Nitrite N |
mg/L | 58 | 3.7 | 0.2 | 27.7 | 2 | 3.4 | 10 |
| Chloride | mg/L | 6 | 41.1 | 7.0 | 145.0 | 0 | 0.0 | 250 |
| Sulfate | mg/L | 4 | 17.7 | 6.1 | 35.3 | 0 | 0.0 | 250 |
| Aluminum | mg/L | 3 | 0.0 | 0.0 | 0.1 | 0 | 0.0 | 0.05-0.2 |
| Arsenic | mg/L | 20 | 0.00 | 0.001 | 0.003 | 0 | 0.0 | 0.01 |
| Barium | mg/L | 10 | 0.04 | 0.00 | 0.14 | 0 | 0.0 | 2 |
| Cadmium | mg/L | 8 | 0.00 | 0.001 | 0.002 | 0 | 0.0 | 0.005 |
| Calcium | mg/L | 57 | 30.31 | 0.25 | 74.66 | - | - | - |
| Chromium | mg/L | 8 | 0.0 | 0.001 | 0.005 | 0 | 0.0 | 0.1 |
| Copper | mg/L | 60 | 0.03 | 0.01 | 2.99 | 2 | 3.3 | 1.0,1.3 |
| Iron | mg/L | 61 | 0.1 | 0.0 | 0.7 | 1 | 1.6 | 0.3 |
| Lead-1st draw |
mg/L | 31 | 0.00 | 0.003 | 0.047 | 3 | 9.7 | 0.015 |
| Lead-Running | mg/L | 45 | 0.003 | 0.003 | 0.018 | 1 | 2.2 | 0.015 |
| Magnesium | mg/L | 38 | 6.91 | 0.05 | 23.56 | - | - | - |
| Manganese | mg/L | 59 | 0.04 | 0.01 | 25.98 | 28 | 47.5 | 0.05 |
| Mercury | mg/L | 29 | 0.05 | 0.001 | 0.454 | 20 | 69.0 | 0.002 |
| Nickel | mg/L | 7 | 0.01 | 0.005 | 0.010 | - | - | - |
| Sodium | mg/L | 19 | 0.01 | 0.01 | 0.45 | - | - | - |
| Zinc | mg/L | 20 | 0.00 | 0.00 | 0.01 | 0 | 0.0 | 5 |
*For corrosivity index, failure criteria based on less than -0.5 or greater than 0.5