Arsenic occurs naturally in soil and minerals and is commonly found in groundwater throughout much of Minnesota. The occurrence and distribution of arsenic in groundwater is difficult to predict. Research is steadily increasing our understanding of the mechanisms and geologic conditions that determine arsenic occurrence in groundwater. The arsenic concentration in a new well, measured at the time of construction, is sometimes higher or lower, compared to subsequent sampling results.
This is the second phase of the Roseau River Watershed Restoration and Protection Strategy (WRAPS) project, which includes: developing the Total Maximum Daily Load (TMDL) study, pollutant load allocations, watershed restoration and protection strategies, and conducting civic engagement.