Assertion: aquifer's groundwater | /r/CapableOf | become contaminated
Facets:
value: naturally
type: MANNER
Source sentences:
text: But there are two caveats to that: one is that groundwater can become naturally contaminated because of its very close connection to the materials of its aquifer, and
text: Groundwater can become contaminated when an excessive amount of pesticides and herbicides are sprayed on agricultural fields, septic tanks leak, or landfills are improperly lined or managed and toxic materials seep through the soil into the aquifer.