From the 1960s until 1978, Dartmouth used a half-acre plot on the college’s Rennie Farm to bury the carcasses of animals used in tracer experiments - in which scientists used radioactive compounds - and nearby residents fear this may have polluted the drinking water. Water Online staffer Peak Johnson reports that the carcinogen 1,4-dioxane was found when the school cleaned the area (removed the carcasses and soil).
When found, the carcinogen was 50 times the state standard of 3 ppb and recently as high 600 ppb in the ground:
Residents believe that an alert about the contamination should have been sent out to them earlier. Both New Hampshire environmental and Dartmouth officials said that “initial test showed the levels of 1,4-dioxane were declining on the site and were projected to remain on the farm site.”