US Environmental Protection Agency (EPA) kwupụtara na Machị 31, 2022 na ọ chọghị ịhazi perchlorate n'ime mmiri ọñụñụ, na-ejigide mkpebi Julaị 2020. EPA kwubiri na mkpebi gara aga dabere na sayensị kachasị mma dị. ogologo okporo ụzọ kemgbe Massachusetts ghọrọ otu n'ime steeti mbụ na-achịkwa perchlorate na mmiri ọṅụṅụ na 2006. (Lee akwụkwọ akụkọ Holland & Knight, "Massachusetts buru ụzọ tụọ 2 ppb mmiri ọṅụṅụ na ịdị ọcha ọkọlọtọ chemical perchlorate.") N'ụzọ na-eju anya, ọ bụ ngwa ngwa na Mkpebi siri ike nke steeti mere afọ gara aga nke dugara EPA na 2020 kwubiri na ọkwa perchlorate na gburugburu ebe obibi belatara ka oge na-aga ma emezughị ụkpụrụ nchịkwa nke Iwu Mmiri Ọṅụṅụ Safe (SDWA).
Iji weghachite, na June 2020, EPA kwuputara na o kpebisiri ike na perchlorate emezughị ụkpụrụ nchịkwa SDWA dị ka ihe na-emetọ mmiri ọṅụṅụ, si otú ahụ kagbuo mkpebi nchịkwa nke 2011. (Lee Holland & Knight's Energy and Natural Resources Blog, "EPA Emechasịa Ya Mkpebi Perchlorate,” June 23, 2020.) E bipụtara mkpebi ikpeazụ EPA Julaị 21, 2020. Kpọmkwem, EPA kpebiri na perchlorates abụghị “ugboro ugboro.” ọkwa nke nchegbu ahụike ọha n'ime ihe SDWA pụtara” yana iwu nke perchlorate anaghị enye "ohere bara uru iji belata ihe egwu ahụike nye ndị na-ejere sistemu mmiri ọha."
Kpọmkwem, EPA tụleghachiri mkpebi nchịkwa nke 2011 wee mee ọtụtụ nyocha n'ime ọtụtụ afọ na-enyocha data ihe omume anakọtara site na Iwu Nleba anya na-adịghị mma (UCMR) na nlekota ndị ọzọ na Massachusetts na California. (Lee Holland & Knight Alert, "EPA na-atụ aro Perchlorate). Ọchịchị Mgbe ọtụtụ afọ nke nyocha, "June 10, 2019.) N'ịtụleghachi dabere na data a, EPA kwubiri na e nwere naanị 15 na-achịkwa mmiri ọha na eze na US Usoro ahụ ga-ọbụna karịa uru kacha nta akwadoro (18 µg / L) .Ya mere. , N'ikwekọ na ngalaba SDWA 1412 (b) (4) (C), EPA kpebisiri ike na, dabere na ozi dịnụ, uru dị n'ịmepụta usoro iwu mmiri ọṅụṅụ bụ isi nke perchlorate nke mba adịghị akwado ụgwọ ndị metụtara ya. N'oge nyocha SDWA na usoro iwu. , EPA kwesịrị ikpebi ma iwu na-enye ohere bara uru iji belata ihe egwu ahụike nke usoro mmiri ọha na-enye tupu ịhazi ya.
The Natural Resources Defence Council ozugbo wepụtara nkwupụta na-akatọ omume ahụ. N'inye akwụkwọ ikpe ya gara aga na-agbagha mkpebi 2020, ọ ka ga-ahụ ma mkpebi ahụ ọ bụ n'ezie njedebe nke okporo ụzọ. nọrọ na-ekiri.