News from ISGlobal
Exposure to trihalomethanes (THMs) in residential water is not associated with an increased risk of breast cancer. This is the main conclusion of a new study by the Barcelona Institute for Global Health (ISGlobal).
The study found “no relationship between breast cancer and the type of water consumed at home,” explained ISGlobal researcher Cristina Villanueva, who coordinated the study. Approximately 75% of participants said they drank tap water, while 21% drank bottled water.
Laia Font-Ribera, lead author of the study, commented: “At common THM levels for Europe, long-term residential exposure to total THMs is not related to breast cancer.” However, the findings do suggest “a moderate association with chloroform in high-exposure cases,” explained Font-Ribera, “although more analysis is needed to understand this relationship.”
The new study, published in Environment International, assessed whether long-term exposure to THMs was associated with increased breast cancer risk. The study enrolled 2,000 women—half of whom had breast cancer—from various parts of Spain (Asturias, Barcelona, Cantabria, Gipuzkoa, León, Madrid, Navarre and Valencia). It was carried out under the umbrella of the MCC-Spain project.
Font-Ribera L, et.al. Long-term exposure to trihalomethanes in drinking water and breast cancer in the Spanish multicase-control study on cancer (MCC-SPAIN). Environ Int. 2017 Dec 28;112:227-234.