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water any of these chemicals in a water source with limited or no guidance no regulatory or source limited with a ofin any waterchemicals these of detection how addressutilities a to water decide will to need Therefore, decade. next in the anytime willchemicals developed is be forthese indication MCLsthat no There • • • • • • following compounds: of groups Thisthe includes environment. the and health to human threat posechemicals a additional that is toxicological evidencethere on CCL, chemicalsthe Aside fromthose forMTBE.is still MCL no Federal MTBE in CCL the wasit to added and 1997, by forMTBE was mandated of groundwater publicized water impact drinking firstnoted MTBE (all are CCL). on the perchlorate of which (1,2,3 groundwater mostcommon of Thissome includes the MCLs. are no Federal forwhich chemicalsthere waters by contamination of source to utilities wateraddress having are Increasingly, year. increasesevery number the Thus, year. each of commerce streamthe This is have (usually time at Over right). (seetable list candidate (CCL) on contaminant the chemicals US also EPA has 103 placed contamination. to waterdrinking respectwith not regulated are in in USA the chemicalsuseof the That is,chemicals. 99.9% for80 MCLs developed contamination level(MCL). maximumState or Federal of an enforceable development the eventually to lead can theseaction level),and goals, level(e.g.public health notification State level, Various at standards the exist standards developing with are charged agencies State year. every of streamcommerce into the introduced are 2,000 an USA,and additional use in the in chemicalscommercial 84,000 than are more There Unregulated Chemicals ●

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Tetrabromobisphenol for those chemicals that pose a threat to human health and the environment. environment. health the and human a to threat posethat forthose chemicals impact was reported in in wasimpact reported gasoline was phased out across most of the USA by 2008. As of 2013, there As 2013, of USAby 2008. of the across out gasoline was most phased contaminants in the news today: today: in news the contaminants n bis average, MCLs are only developed for two to ten chemicals per year. year. per for chemicals ten to developedaretwo only MCLsaverage, soaps, detergents soaps, (2

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