NH communities are working to comply with the state’s lowered  allowable limit for arsenic in public drinking water, which goes into effect July 2021. Governor Chris Sununu signed legislation in July which reduced the allowable limit for arsenic in public drinking water from 10 ppb (parts per billion) to 5 ppb. Dartmouth’s Superfund Program researchers have found that long-term exposure to low levels of arsenic increases cancer risks and may also be linked to heart disease and diabetes. More information