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on Toxic Water?
According to EPA's CWA recommended criteria, a level of 0.018 ug/L of arsenic is associated with a cancer risk of one in a million people exposed. Therefore, a level of 0.18 is a risk of one cancer in one hundred thousand people and a level of 1.8 is a risk of one cancer in ten thousand people. Therefore, EPA's SDWA Maximum Contaminant Level of 10 ug/L is greater than one cancer per ten thousand people exposed to that level. And that's NOT factoring in the non-cancer risks associated with arsenic (e.g., heart disease) nor EPA's Science Advisory Board's new cancer slope factor (I believe the potency factor increased for bladder cancer by 15-20%).
I'm not clear on why you think I'm not entitled to state my opinion that the SDWA level is high. I'm a member of the public.
My entire point is that the SDWA level for arsenic presents a much higher risk than the CWA level for arsenic, a risk level (one in a million of cancer) that is typically the goal used for clean water in Oregon and most other states. A consumer of water reading the annual report required under the SDWA could be easily confused into thinking he or she is obtaining information concerning the safety of the water when, in fact, that information has factored in the cost of treatment to allow for a much higher risk.
posted 2 years, 4 months ago
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