in addition to the disclosure issue, usually need to do do gut renovation since the building materials can absorb the vapors.also check if home is serviced by septic. the waste stream of meth labs are like chemicals from a dry cleaner and can result in groundwater contamination. 

If it's just groundwater, not from a rain, it's pretty common and not that big of a deal in general.

I found a number of cracks within some of the buildings that had lateral movement, as well as ground water, which means there is likely a broken sewer line somewhere nearby, plus a number of buildings had asbestos siding, and all the roofs have been patched to death, tho they claim they replaced them.

The EPA had them running ground water pumps for 2 years plus until they said it was clean enough to build.

Hey folks,Case Study: a distressed waterfront property that has an unusual ground water situation. 

If you’ve ever sat on a round, one foot off the ground, water wasting toilet, you’ll appreciate the difference.

@Justin Dar  You definitely don't want someone dumping hazardous products on your lot such as oil and any other harsh chemicals that could potentially contaminate the ground water.

Could just be ground water.

In addition, if the area of Houston has a Municipal Setting Designation, you can ignore groundwater impacts.

We don't build many basements here due to high groundwater.