MethViewer. Yeah, I said it.

We map where crimes occur.  We map where sex offenders live.  Now, Arkansas maps properties "believed to be contamininated" by the production of methamphetamine (citation: here and here).

It's called MethViewer, and it's operated by the The Environmental Preservation and Technical Services Division of the Arkansas Department of Environmental Quality.  In addition to the map tool, you can access the list of properties on their site.