Lead enters drinking water primarily through corrosion of plumbing materials. The EPA action level is 15 ppb. These systems have the lowest measured lead concentrations.
N/A ppb
Lowest Lead Level
NaN ppb
Average (Top 25)
15 ppb
EPA Action Level
Lead exposure can cause serious health problems, especially for children and pregnant women. It affects brain development and can cause learning difficulties, behavioral problems, and reduced IQ.
There is no safe level of lead exposure. The EPA requires water systems to take action if lead levels exceed 15 ppb in more than 10% of customer taps sampled.
| Rank | City & System | Lead (ppb) | Overall Score | Action |
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