The well study explores how groundwater chemistry correlates with local bedrock and geologic structures such as faults and fractures. Hall and her students will test for arsenic as well as 14 other elements. Testing is free and results will be kept confidential.

“We have no reason to expect that there are concerning levels of chemical contaminants in your water,” Hall said. “However, there is evidence for elevated arsenic levels in the groundwater of some coastal Maine regions, and we’re exploring whether the levels of arsenic correlate with certain geological features.”

Dr. Sarah Hall Dr. Sarah HallThe information collected in this effort will build on prior well water data collected by COA students and faculty in 2016. With this second round of sampling, Hall and Moroz hope to fill some spatial gaps in their dataset. They are particularly interested in collecting samples from properties near Town Hill, Indian Point, Salsbury Cove, and Hulls Cove; however, areas outside of these locations will be considered if time allows.

Studies have shown that consuming even very low levels of arsenic can have harmful, long-term health effects.

The COA study is rooted in the All about Arsenic education initiative, a collaborative project initiated by the MDI Biological Laboratory and Dartmouth College. The program was initially funded through an EPA Environmental Education grant and is currently funded through a NIH Science Education Partnership Award grant.

Initial sampling set to take place during the first two weekends of February: Saturday, Feb. 2 and Sunday, Feb. 3; and on Saturday, Feb. 9 and Sunday, Feb. 10. To participate, or learn more, contact Hall at 207-801-5735 or If you would like to participate but will not be available during this time, contact Hall about setting up a sample time in early February.

The chemical tests will be run at Dartmouth’s Trace Element Analysis Core and will be added to existing Maine Center for Disease Control data sets for this region as well as to the All About Arsenic data portal, in low resolution to protect privacy. Hall and Moroz will not be testing for bacteria and nutrients, therefore, this test would not replace the need for regular water testing.