USGS crews will be sampling water for contaminants like pesticides, E. coli bacteria and sediment in areas hardest hit by Sandy.
The project is part of a nation-wide effort to ensure public health and safety following the super storm.
"Significant high water events are important to document, because a storm ... like this can flush large quantities of nutrients, pesticides, and sediment into rivers," said Charles Crawford, coordinator of the sampling effort, in a statement. "When looking at long-term water quality trends and year-to-year variation, this hurricane could be a defining event for the past few decades, and itís important that USGS captures a complete picture of what happens."
Officials are concerned about excessive nutrient build-up, which can cause dangerous toxic algal blooms to form.
Sampling will take place in various states, including: New Jersey, Pennsylvania Maryland and Virginia.