Washington gets their water from Arlington Virginia
Washington D.C.
Washington gets their water
from Arlington Virginia
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Category of Contaminants
Units DC Drinking Water Typical Sources of Contaminants
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Disinfectants and Disinfection Byproducts | |||
| Chlorine | ppm | 3.7 | 3.4 to 3.7 |
| Total Trihalomethanes3 | ppb (4-quarter running average | 53 (highest 4-quarter average) | 17 to 94 (individual samples) |
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Inorganic Metals
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| Barium | ppm | 0.05 | 0.03 to 0.05 |
| Copper (at the customer’s tap) | ppm | 0 samples1 out of 53 above AL | 90% of samples = 0.1 |
| Lead (at the customer’s tap) | ppb | 26 samples1 out of 53 above AL | 90% of samples = 49 |
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Inorganic Ions
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| Fluoride | ppm | 1.0 | 0.6 to 1.0 |
| Nitrate (as N) | ppm | 2.7 | 0.2 to 2.7 |
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Unregulated Contaminants
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| Status | Highest | Range | Typical Sources of Contaminants |
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Disinfection Byproducts
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| NR | 13.0 | 1.6 to 13.0 | The non-regulated (NR) contaminants shown here are byproducts of drinking water chlorination. EPA required that large water providers monitor for thesecompounds to help determine the need for future regulations. |
| NR | 0.9 | 0.5 to 0.9 | |
| NR | 53 | 15 to 53 | |
| NR | 4.9 | 1.1 to 4.9 | |