"We were surprised at the results, especially for Hillsborough and Strafford counties," USGS hydrologist Joseph Ayotte said. "We knew from previous studies that arsenic was a problem regionally in eastern New Hampshire. What this study has done is allow us to better identify the extent of arsenic problems at a local level and provide useful information to citizens and state health authorities."
The study, conducted in conjunction with the U.S. Environmental Protection Agency, the New Hampshire Department of Health and Human Services and Department of Environmental Services, and the New Hampshire Estuaries Project, concluded that 20 percent of the homes across Hillsborough, Rockingham and Strafford counties are using private wells with arsenic concentrations above 10 micrograms per liter, which will be the state and federal standard in January 2004. In some parts of the counties, the incidence is more than 30 percent of homes. Results also show that 90 percent of those who participated in the study use their wells for drinking water.
"Today's event is all about putting important information in the hands of citizens so that they can make informed decisions about how to manage and test their drinking water wells, and ultimately protect their families," said Robert Varney, Regional Administrator for EPA New England. "As they say, 'knowledge is power.'"
According to Ayotte, recent studies suggest that the arsenic is predominantly naturally occurring and related to the geology of the area. However, he said that human sources may also have contributed to the problem, but that no studies have been done to dete
Contact: Debra Foster
United States Geological Survey