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. choyamba ikupereka madzi akumwa a 2 ppb ndi kuyeretsa koyenera kwa mankhwala a perchlorate. ”) Zodabwitsa ndizakuti, inali njira yofulumira komanso yotsimikizika yomwe mayiko adachita zaka zapitazo zomwe zidapangitsa kuti EPA mpaka 2020 itsimikize kuti milingo ya perchlorate m'chilengedwe idatsika pakapita nthawi ndipo sanakwaniritse malamulo a Safe Drinking Water Act (SDWA).
Kubwerezanso, mu June 2020, EPA inalengeza kuti yatsimikiza kuti perchlorate sinagwirizane ndi malamulo a SDWA monga kuwononga madzi akumwa, motero kuchotseratu chigamulo cha 2011. 2020. Mwachindunji, bungwe la EPA lidatsimikiza kuti ma perchlorate sakhala "ochitika pafupipafupi komanso pafupipafupi." kuchuluka kwaumoyo wa anthu malinga ndi tanthauzo la SDWA" komanso kuti kuwongolera perchlorate "sikupereka mwayi wochepetsera ziwopsezo zaumoyo kwa omwe amagwiritsa ntchito madzi aboma."
Mwachindunji, EPA idawunikiranso chigamulo chowongolera cha 2011 ndipo idasanthula kangapo pazaka zambiri ndikuwunika zomwe zidasonkhanitsidwa ku UCMR (UCMR) ndi kuwunika kwina ku Massachusetts ndi California. Kuwunikanso kutengera deta iyi, EPA yatsimikiza kuti pali madzi 15 okha omwe amayendetsedwa ndi anthu ku US. Dongosololi lidzadutsanso mtengo wochepera (18 µg/L). Chifukwa chake, motsatira SDWA Gawo 1412(b)(4)(C), EPA idatsimikiza kuti, kutengera zomwe zilipo, phindu lokhazikitsa dongosolo la madzi akumwa la dziko lonse silingachepetse mtengo wa madzi akumwa. rulemaking process, EPA ikuyenera kudziwa ngati malamulowa amapereka mwayi wochepetsera ngozi zomwe zimaperekedwa ndi madzi amtundu wa anthu asanakonze.
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 kuwona ngati chigamulochi chilidi kutha kwa msewu.khalani maso.