Radon in Water Federal Guidelines and Proposed Regulations Radon in Water Quiz Which is responsible for more deaths in the U.S. each year? A) Radon in drinking water C) Drunk driving B) Radon in indoor air D) Fires and drowningsAnswer B) Radon in indoor air Why do surface-water reservoirs have a low radon concentration? A) Low-radon materials are use in construction C) Radon diffuses out the surface into the air B) Most of the radon is absorbed by the plants D) They don't have low radon concentrationsAnswer C) Radon diffuses out the surface into the air How is the solubility of radon in water related to the water temperature? A) Increases linearly with temperature C) Decreases linearly with temperature B) Increases logarithmically with temperature D) Decreases logarithmically with temperatureAnswer D) Decreases logarithmically with temperature What approximate percentage of New Yorkers rely on public-water supplies for their drinking water? A) 10% C) 50% B) 25% D) 90%Answer D) 90% What approximate percentage of New Yorkers rely on groundwater for their drinking water? A) 10% C) 50% B) 25% D) 90%Answer B) 25% Which type of material is most likely to contain large amounts of groundwater? A) Till C) Clay B) Bedrock D) SandAnswer A) Till Which area of New York State has elevated concentrations of radon in the groundwater? A) Hudson Highlands C) Adirondacks B) Long Island D) Finger LakesAnswer A) Hudson Highlands Which geology is most often associated with elevated concentrations of radon in the groundwater? A) Shale C) Limestone B) Sandstone D) GraniteAnswer D) Granite Which occurs at the highest concentration (picoCurie per Liter; pCi/L) in groundwater in New York? A) Radon C) Uranium B) Radium D) ThoriumAnswer A) Radon Which type of system is required to test for radioactivity levels in the drinking water? A) Private well C) Rest stops and campgrounds B) Community supply D) Hospital and schoolsAnswer B) Community supply What are the maximum concentrations of radium (pCi/L) and uranium (ug/L) allowed in community water supplies? A) 5 for both C) 5 and 30, respectively B) 5 and 15, respectively D) 15 for bothAnswer C) 5 and 30, respectively What county of New York has the highest radon levels in public water supplies? A) Putnam C) Suffolk B) Onondaga D) St. LawrenceAnswer A) Putnam Which water source typically contains the highest concentration of radon? A) Surface pond C) Well B) Ocean D) SpringAnswer C) Well As a rule of thumb, what concentration of radon in water (pCi/L) will produce 1 pCi/L of indoor radon during normal water use at a home? A) 100 B) 1,000 C) 10,000 D) 100,000Answer C) 10,000 Print