Drinking water Technology, Eawag, developed a method by which hazard maps could be produced for geogenic toxic substances in groundwater. This provides an efficient way of determining which wells should be tested. Parameters for drinking water quality typically fall within three categories: Physical and chemical parameters include heavy metals, trace organic compounds, total suspended solids (TSS), and turbidity. Microbiological parameters include Coliform bacteria, "E. coli", and specific pathogenic species of bacteria (such as cholera-causing "Vibrio cholerae"), viruses, and protozoan parasites. Chemical parameters tend to pose more of a chronic health risk through buildup of heavy metals although some components like nitrates/nitrites and
Drinking fountain of the inland north and in the west, while "water fountain" dominated other parts of the country. The term "bubbler" is sometimes used in the Portland, Oregon, region where in the early 1900s former Wisconsin resident Simon Benson installed 20 fountains, which are now known in the Portland area as "Benson Bubblers". Currently, there are 52 of these iconic four-bowl drinking fountains still providing free-flowing water in downtown Portland. Frost-resistant drinking fountains are used outdoors in cold climates and keep the control mechanisms below the frostline resulting in a delay for when water comes out. Drinking fountain A drinking fountain,