KEY POINTS
  • Seven dangerously polluted Superfund sites in and around Houston were inundated with water, in some cases many feet deep, in the wake of Hurricane Harvey

As Dwight Chandler sipped beer and swept out the thick muck caked inside his devastated home, he worried whether Harvey's floodwaters had also washed in pollution from the old acid pit just a couple blocks away.

Long a center of the nation's petrochemical industry, the Houston metro area has more than a dozen Superfund sites, designated by the Environmental Protection Agency as being among America's most intensely contaminated places. Many are now flooded, with the risk that waters were stirring dangerous sediment.