Tragedy in a Wealthy U.S. Community: Homes Built Over Abandoned Oil Wells
No Proven Link Yet Between Oil Wells and Cancer Cases

Pediatric cancer cases continue to emerge in a wealthy town in California, USA. Residents have been shocked after a past warning sign advising against building residences in the area was discovered only recently. This region was originally an oil field, and the land contains buried abandoned oil wells.


According to local media such as the 'California Post,' at least six cases of Ewing sarcoma have been diagnosed in Ladera Ranch, Orange County, California over the past decade.


Ewing sarcoma is a type of cancer that develops in the bones or surrounding muscles of children and adolescents. It is a rare disease in the United States, which has a population of 340 million, with only 200 to 240 cases diagnosed annually. However, Ladera Ranch, which has a population of just around 20,000, has already seen six such cases reported.


Ladera Ranch, a rural village in California, USA. It is a beautiful village developed near a ranch in the late 1990s, but it was later revealed that there were abandoned oil wells nearby. Screenshot from Expedia website

Ladera Ranch, a rural village in California, USA. It is a beautiful village developed near a ranch in the late 1990s, but it was later revealed that there were abandoned oil wells nearby. Screenshot from Expedia website

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Megan Mathison, a resident who lost her child to Ewing sarcoma, told the media, "The population of this town is 25,000, and only a few thousand people are in the Facebook group, but I have already received 62 responses related to the disease." She added, "One person told me that there are three brain tumor patients in a single neighborhood where she lives." In addition, there have been multiple reports of pets being diagnosed with cancer, raising concerns that cancer cases are unusually high in this community.


Initially, residents suspected the possible side effects of herbicides or pesticides. However, the media recently reported they found a shocking warning in a document from the California Department of Natural Resources about the area.


The warning, written in February 2002, stated that oil wells (holes used for extracting oil) had been buried on the site. The engineer who wrote the document even handwritten, "No construction should be carried out above this well without further review." However, the specific reason why construction should not take place on the covered oil wells was not disclosed.


Kenneth Henderson, who was acting Oil and Gas Supervisor at the time and approved the document, said in an interview with another local media outlet, "I don’t recall why that statement was made," but speculated, "It’s possible that the well sealing did not meet current standards."


According to the media, if abandoned oil wells are not properly sealed, the seal may weaken over time, allowing underground gases or other substances to migrate to other land. Oil wells can contain potential pollutants such as methane, hydrocarbons, benzene, and other volatile organic compounds. Most of these substances are carcinogenic, and if they contaminate the air, soil, or groundwater, they can pose a serious threat to human health.



Ladera Ranch began to be developed as a residential area in the late 1990s. However, the media added that it must be further verified whether pollutants actually leaked from the abandoned oil wells, and whether Ewing sarcoma cases resulted from such contamination.


This content was produced with the assistance of AI translation services.

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