Aggressive Water: Assessing the Extent of the Problem

摘要: The corrosion potential (aggressiveness) of drinking water is an important factor in distribution systems from the viewpoint consumer health. Craun and McCabe1 have suggested that household plumbing contributes to metal content water, which may be related cardiovascular disease rates. Highly aggressive flowing through asbestos-cement pipes can cause asbestos fibers released into water. possible relationship between ingested cancer currently under study. extent corrosive a problem US difficult assess. However, sampling analysis done by EPA conjunction with nationwide health survey has recently provided data make it calculate several aggressiveness indexes representative areas before comes contact system plumbing. It also estimate proportion utilities country Water samples were collected as part cooperative study National Heart, Lung, Blood Institute, Center for Health Statistics, Bureau Census involved nutritional 35 geographically distributed US. sample randomly selected population. or primary units (psus) among approximately 1900 psus geographic territory mainland been divided (Fig. 1). Each psu consists county small group contiguous