# jefferson-county-part-herculaneum-mo · MISSOURI · Jefferson County · Lead (1978) — Current EPA nonattainment county designations by pollutant

For jefferson-county-part-herculaneum-mo · MISSOURI · Jefferson County · Lead (1978), pollutant / naaqs is Lead (1978); nonattainment area name is Jefferson County (part); Herculaneum, MO; partial county is yes; county or area is Jefferson County; state is MISSOURI; data current as of is August 31, 2026, recorded from its source on 2026-08-31.

- **Row ID:** jefferson-county-part-herculaneum-mo _(our reading, not quoted from the source)_
- **State:** MISSOURI _(our reading, not quoted from the source)_
- **County or area:** Jefferson County _(verified: appears in the quote below)_
- **Pollutant / NAAQS:** Lead (1978) _(verified: appears in the quote below)_
- **Partial county:** yes _(our reading, not quoted from the source)_
- **Nonattainment area name:** Jefferson County (part); Herculaneum, MO _(verified: appears in the quote below)_
- **Data current as of:** August 31, 2026 _(verified: appears in the quote below)_

## What the source says

> Jefferson County | Lead (1978) | * | Jefferson County (part); Herculaneum, MO

## Source

- https://www3.epa.gov/airquality/greenbook/ancl.html

Last verified: 2026-08-31. Review by: 2027-02-27.
Part of [Current EPA nonattainment county designations by pollutant](https://referencesource.org/nonattainment-county-designations-by-pollutant/).