Keywords
Koppën classification
index of Lang
stomach cancer
bladder cancer
How to Cite
Abstract
The present study aims to determine the levels of trihalomethanes (THMs) in drinking water from different Spanish cities, and assess whether the temperature and rainfall influence them. Also assess the possible association of THM to mortality from stomach cancer and bladder. For this we took water samples from 49 cities in 2002, 2005 and 2006, which were analyzed by gas chromatography coupled with mass spectrometry obtaining THM levels. Climatic classifications were made according Koppën Lang and index the data of temperature and precipitation, and finally death rates from cancer of the stomach and bladder were standardized by sex and age. We found a decrease in the levels of THMs in Spain over time, managing to be below the limits established by Royal Decree 140/2003, but three cities studied. The results indicate that climatic classifications most of the Spanish territory has a temperate climate type - Wet. However it was found that different climatic zones exhibit an influence on the levels of THMs. Nor was significant correlation of the levels of THM with cancer of stomach and bladder, but is significant between stomach cancer and Köppen climate classification. It should continue with studies that include other variables allow clarifying and / or strengthening these results.
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