Bungwe la US Environmental Protection Agency (EPA) lidalengeza pa Marichi 31, 2022 kuti silikufuna kuwongolera perchlorate m'madzi akumwa, ndikusunga chisankho chake cha Julayi 2020. msewu wautali kuchokera pamene Massachusetts inakhala imodzi mwa mayiko oyambirira kulamulira perchlorate mu madzi akumwa mu 2006. Zomwe mayiko adachita zaka zapitazo zomwe zidapangitsa kuti EPA ifike mu 2020 idatsimikiza kuti kuchuluka kwachilengedwe m'chilengedwe kudatsika pakapita nthawi ndipo sikunakwaniritse malamulo a Safe Drinking Water Act (SDWA).
Kubwerezanso, mu June 2020, EPA idalengeza kuti yatsimikiza kuti perchlorate siyikukwaniritsa miyezo ya SDWA monga choipitsa madzi akumwa, motero kuchotseratu chigamulo cha 2011. Chisankho cha Perchlorate," June 23, 2020.) Lingaliro lomaliza la EPA lidasindikizidwa pa Julayi 21, 2020. Mwachindunji, EPA idatsimikiza kuti ma perchlorate sakhala "pafupipafupi komanso pafupipafupi". perchlorate "sikupereka mipata yabwino yochepetsera ngozi zathanzi kwa omwe akutumikira pamadzi amtundu uliwonse."
Mwachindunji, EPA idawunikanso chigamulo chowongolera cha 2011 ndipo idasanthula kangapo pazaka zambiri ndikuwunika zomwe zidasonkhanitsidwa kuchokera ku UCMR (UCMR) ndi kuwunika kwina ku Massachusetts ndi California. (Onani Holland & Knight Alert, "EPA Proposes Perchlorate Ulamuliro Pambuyo Zakafukufuku Zakafukufuku, "June 10, 2019.) Kuwunikanso kutengera deta iyi, EPA ikumaliza kuti pali madzi oyendetsedwa ndi anthu 15 okha ku US Dongosolo lidzadutsanso mtengo wochepera wovomerezeka (18 µg/L). , motsatira SDWA Section 1412(b)(4)(C), EPA inatsimikiza kuti, malinga ndi zomwe zilipo, ubwino wokhazikitsa lamulo la dziko lonse la perchlorate primary madzi akumwa sizilungamitsidwa ndi ndalamazo.Panthawi yowunika ndi kupanga malamulo a SDWA. , EPA ikuyenera kudziwa ngati malamulo amapereka mwayi wothandiza kuchepetsa ngozi zomwe zimaperekedwa ndi madzi amtundu wa anthu asanakhazikitse.
Bungwe loteteza zachilengedwe la Natural Resources Defense Council nthawi yomweyo lidapereka chikalata chodzudzula zomwe zidachitikazo.Potengera mlandu wake wam'mbuyomu wotsutsa chigamulo cha 2020, zikuyenera kuwonedwa ngati chigamulochi chilidi kutha kwa msewu.khalani maso.