Ụlọ ọrụ US Environmental Protection Agency (EPA) kwupụtara na Machị 31, 2022 na ọ chọghị ịhazi perchlorate na mmiri ọṅụṅụ, na-ejigide mkpebi July 2020. The EPA kwubiri na mkpebi gara aga dabeere na sayensị kacha mma dị. Ọ bụ ogologo ụzọ kemgbe Massachusetts ghọrọ otu n'ime steeti mbụ na-achịkwa perchlorate na mmiri ọṅụṅụ Holland. "Massachusetts buru ụzọ tụọ 2 ppb mmiri ọ drinkingụ andụ na ịdị ọcha ọkọlọtọ chemical perchlorate.") N'ụzọ na-eju anya, ọ bụ ngwa ngwa na mkpebi siri ike nke steeti mere afọ ole na ole gara aga mere ka EPA ruo 2020 kwubiri na ọkwa perchlorate na gburugburu ebe obibi belatara ka oge na-aga ma emezughị ụkpụrụ nchịkwa nke Iwu Nchekwa Mmiri Mmiri (SDWA).
Iji weghachite, na June 2020, EPA kwuputara na o kpebisiri ike na perchlorate emezughị ụkpụrụ nchịkwa SDWA dị ka ihe na-emerụ mmiri ọṅụṅụ, si otú a kagbuo mkpebi nchịkwa nke 2011. 2020.Kpọmkwem, EPA kpebisiri ike na perchlorates abụghị "ugboro ugboro na ugboro ugboro" ọkwa nke nchegbu ahụike ọha na eze n'ime ihe SDWA pụtara" yana na iwu nke perchlorate adịghị "enye ohere bara uru iji belata ihe ize ndụ ahụike nye ndị na-eje ozi na usoro mmiri ọha."
Kpọmkwem, EPA tụleghachiri mkpebi nchịkwa nke 2011 ma mee ọtụtụ nyocha n'ime afọ ndị na-enyocha data ihe omume anakọtara site na Iwu Nleba anya na-adịghị mma (UCMR) na nlekota ndị ọzọ na Massachusetts na California. na e nwere naanị 15 na-achịkwa mmiri ọha na eze na US The usoro ga-ọbụna karịa akwadoro kacha nta uru (18 µg / L) .Ya mere, dị ka SDWA Nkebi nke 1412 (b) (4) (C), EPA kpebisiri ike na, dabere na ozi dịnụ, uru nke iguzobe a mba perchlorate isi mmiri ọṅụṅụ ụkpụrụ adịghị akwado na-achị na-achị SDWA metụtara, na-eme ka EPA nke ngalaba 1412 (b) (4) (C). 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.