Water Quality Final Notes
Risk- The likelihood of injury disease or death.
Environmental rise- Risk resulting from human exposure to a potential environmental hazard.
Water, air and chemicals regulated by the USEPA
Food regulated by Food and Drug Administ
RCR (relative cost of recycling) = (cost of producing one unit of recycle water / cost of producing
one unit of water w/o recycling) x 100
Reverse osmosis: Major, established method
Forward Osmosis: minor, experim
Group D: not classifiable
Negative data (not a carcinogen)
Hazard Identification: Review and analyze toxicity, Search for evidence of the toxicity of a
substance, and Evaluate if toxic effects in one setting will occur in other settings.
Sources of Toxic
Dose-response evaluation: Performed to estimate the incidence of the adverse effect of a
substance as a function of the magnitude of human exposure to it.
Excess lifetime cancer rise
ELCR= Average daily dose (mg/kg day) x slope factor (mg/kg day)-1 (dimen