The Camp Lejeune water contamination problem occurred at Marine Corps Base Camp Lejeune from 1953 to 1987. During that time, United States Marine Corps (USMC) service members and their families living at the base bathed in and ingested tap water that was contaminated with harmful chemicals at concentrations from 240 to 3400 times levels permitted by safety standards. An undetermined number of former base residents later developed cancer or other ailments, which many blame on the contaminated drinking water. Victims claim that USMC leaders concealed knowledge of the problem and did not act properly in trying to resolve it or notify former base residents that their health might be at risk.