I-Arhente yoKhuseleko lokusiNgqongileyo yase-US (EPA) yabhengeza nge-31 kaMatshi ngo-2022 ukuba ayizimiselanga kulawula i-perchlorate emanzini okusela, igcina isigqibo sayo sikaJulayi 2020. I-EPA yagqiba kwelokuba isigqibo sangaphambili sasisekwe kweyona nzululwazi ikhoyo. Kube yindlela ende ukusukela oko iMassachusetts yaba lelinye lamazwe okuqala okulawula i-perchlorate kumanzi okusela e-Kids. Okokuqala iphakamisa i-2 ppb yamanzi okusela kunye nokucocwa okusemgangathweni kwemichiza ye-perchlorate.") Okuhlekisayo kukuba, yayilinyathelo elikhawulezayo neliqinisekileyo elathathwa ngamaphondo kwiminyaka eyadlulayo elakhokelela i-EPA ukuya ku-2020 yafikelela kwisigqibo sokuba amanqanaba e-perchlorate kwindalo esingqongileyo ehlile ngokuhamba kwexesha kwaye akahlangabezani nemigangatho yolawulo yoMthetho waManzi okuSela ngokuKhuselekileyo (SDWA).
Ukuphindaphinda, ngoJuni ka-2020, i-EPA yabhengeza ukuba izimisele ukuba i-perchlorate ayizange ihlangabezane nemigangatho yokulawula ye-SDWA njengento engcolisa amanzi okusela, ngaloo ndlela irhoxisa isigqibo solawulo sika-2011. 2020. Ngokukodwa, i-EPA igqibe kwelokuba iiperchlorate “azirhoqo kwaye aziqhelekanga.” amanqanaba enkxalabo yempilo yoluntu ngokwentsingiselo ye-SDWA” kwaye ukulawulwa kwe-perchlorate “akuboneleli ngamathuba aluncedo okunciphisa imingcipheko yempilo kwabo babonelela ngeenkonzo zamanzi zikawonke-wonke.”
Ngokukodwa, i-EPA iphinde yahlalutya isigqibo sokulawula i-2011 kwaye yenza uhlalutyo oluninzi kwiminyaka yokuvavanya idatha yesiganeko eqokelelwe kwi-UCMR engalawulwayo yoLawulo lokuBeka iMonitoring (UCMR) kunye nolunye uhlolo eMassachusetts naseCalifornia. Ukuphonononga kwakhona ngokusekwe kule datha, i-EPA igqibe kwelokuba kukho kuphela i-15 elawulwayo yonikezelo lwamanzi lukawonke-wonke e-US Inkqubo iya kuthi igqithe kwexabiso eliphantsi elicetyiswayo (18 µg/L). Ngoko ke, ngokungqinelana neCandelo le-SDWA 1412(b)(4)(C), i-EPA imisele ukuba, ngokusekelwe kulwazi olukhoyo, iinzuzo zokuseka i-perchlorate yesizwe esisiseko ayiniki maxabiso aphantsi okusela kunye ne-DWA. inkqubo yomthetho, i-EPA kufuneka iqinisekise ukuba ummiselo ubonelela ngethuba elinentsingiselo lokunciphisa iingozi zempilo ezibonelelwa yinkqubo yamanzi kawonkewonke phambi kokulawula.
I-Natural Resources Defense Council yakhupha ngoko nangoko ingxelo egxeka isenzo.Ngenxa yesimangalo sayo sangaphambili esiphikisa isigqibo sika-2020, kuya kuhlala kubonakala ukuba eso sigqibo sisiphelo sendlela ngokwenene.hlala ubukele.