The Health Advisory (HA) Program, sponsored by the EPA’s Office of Water (OW), publishes concentrations of drinking water contaminants at Drinking Water Specific Risk Level Concentration for cancer (10-4 Cancer Risk) and concentrations of drinking water contaminants at which noncancer adverse health effects are not anticipated to occur over specific exposure durations – One-day, Ten-day, and Lifetime – in the Drinking Water Standards and Health Advisories (DWSHA) tables. The One-day and Ten-day HAs are for a 10 kg child and the Lifetime HA is for a 70 kg adult. The daily drinking water consumption for the 10 kg child and 70 kg adult are assumed to be 1 L/day and 2 L/day, respectively. The Lifetime HA for the drinking water contaminant is calculated from its associated Drinking Water Equivalent Level (DWEL), obtained from its RfD, and incorporates a drinking water Relative Source Contribution (RSC) factor of contaminant-specific data or a default of 20% of total exposure from all sources. Maximum Contaminant Levels (MCLs) and Maximum Contaminant Level Goals (MCLGs) for some regulated drinking water contaminants are also published.
مشاهده ادامه این مطلب فقط برای اعضای سایت فراگیر علمی تخصصی محیط زیست فراهم می باشد. خواهشمنداست جهت مشاهده کامل این نوشته، ثبت نام کنید و به حساب کابری خود وارد شوید. ثبت نام در اینجا کاملاً رایگان است.