Original sentence: A 2008 report said Kripalu's well-based water-supply system contained one form of uranium and two forms of radium, in amounts below legal limits, but at "concentrations at which scientific research indicates humans are exposed to a risk of cancer or other diseases, and typically assume lifetime ingestion of about half a gallon of water per day by an adult of about 150 pounds" based on interpretations by The New York Times of information provided by one or more of the United States Environmental Protection Agency(USEPA), the United States Geological Survey, or the California Office of Environmental Health Hazard Assessment.In 2007, the state set an August 2009 deadline for retirement of one of Kripalu's wells, due to construction in the area of the well.Kripalu's water supply as of 2009 consisted of purchased surface water, which at the time represented a recent change from its previous reliance on sub-surface wells.The USEPA listed nine reporting and monitoring violations for that same system between 1998 and 2001.The state reported in 2003 that Kripalu's now-retired wells were subject to a "high threat" of contamination from possible pesticide overuse or potential fuel spills
Edited sentence: Kripalu's water supply as of 2009 consisted of purchased surface water, which at the time represented a recent change from its previous reliance on problematic on-site wells