Lead Nonattainment Area/State/County Report
As of December 14, 2012| East Helena Area (Lewis and Clark Co.), MT () | |
| MONTANA (Region VIII) | |
| Lewis And Clark Co (P) | |
| City of East Helena and vicinity. | |
| Jefferson County (part); Herculaneum, MO () | |
| MISSOURI (Region VII) | |
| Jefferson Co (P) | |
| Within city limits of Herculaneum. | |
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